D.

Lookup field

A lookup field is a type offield that creates a relationship between two objects
and allows users to select a record from one object as a value for another object. A lookup relationship creates a one-to-many relationship between two objects, where each parent record can have many child records but each child record can have only one parent record. A lookup relationship also allows limited access to child records, meaning that users can
see only those child records that they have access to based on their profile permissions and sharing settings.
References:https://help.salesforce.com/s/articleView?id=sf.relationships_lookup.htm&type=5

B.

Splits

Splits is a feature that should be used to meet this requirement. Splits allows
users to assign credit to opportunity team members based on the level of effort contributed by each person toward each deal. Users can create different types of splits, such as revenue or overlay splits, and specify the percentage or amount of credit for each team member.
References:https://help.salesforce.com/s/articleView?id=sf.forecasts3_splits_over
view.htm&type=5

B.

The Assignment Rule checkbox is selected by default.

The Assignment Rule checkbox is a checkbox that appears on manual case
creation pages when assignment rules are defined for cases. The Assignment Rule checkbox determines whether or not to apply assignment rules to manually created cases. If the Assignment Rule checkbox is selected by default, then any manually created cases will be assigned according to assignment rules instead of being owned by the agent creating them. To prevent this from happening, an administrator can either deselect the
Assignment Rule checkbox when creating cases manually; or change the default setting for this checkbox under setup by selecting or deselecting Use active assignment rules by default.
References:https://help.salesforce.com/s/articleView?id=sf.customize_casesupport_assign.htm&type=5

C.

Lightning page

Lightning page allows you to customize a record page and add a screen flow
as acomponent. You can use the Lightning App Builder to drag and drop the Flow
component onto the page and select the screen flow you want to display.
References: https://help.salesforce.com/s/articleView?id=sf.flow_distribute_lightning_page.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.flow_builder_overview.htm&type=5

B.

Web-to-Case

A.

The data in the field is stored for 20 days.

When you delete a custom field, the data in that field is stored for 20 days
before it is permanently deleted. During this time, you can restore the field and its data from the Recycle Bin or use Data Loader to export the
data.
References:https://help.salesforce.com/s/articleView?id=sf.customize_del_field.htm&t
ype=5

B. Object layouts should be configured to include the groups related list.
C. The Add Record action must be configured in the group publisher.

C.

Reset password on the user's record detail page.

D.

Use the unlock button on the user's record detail page.

To help a user who has attempted to log in multiple times and has been
locked out of Salesforce, the administrator should reset password on the user’s record detail page and use the unlock button on the user’s record detail page. Resetting password will generate a new temporary password and send it to the user’s email address. Using unlock will restore access for a locked-out user without changing their password or waiting for lockout period to end. Logging in as the user or resetting the password policieswill not help a locked-out user log in to Salesforce.
References:https://help.salesforce.com/s/articleView?id=sf.users_passwords.htm&type=5https://help.salesforce.com/s/articleView?id=sf.users_unlock.htm&type=5