If a project manager is responsible for approving time sheets or submitting time cards on...

According to the ServiceNow documentation1, the timecard_admin role can approve time sheets or submit time cards on behalf of team members. This role also has the ability to create and modify time sheet policies, time sheet groups, and time sheet periods. The other options are incorrect because:

A. activity_admin: The activity_admin role can create and modify activities, activity sets, and activity plans2.

C. form_admin: The form_admin role can create and modify forms, form sections, and form layouts3.

D. approval_admin: The approval_admin role can create and modify approval rules, approval groups, and approval stages4.

1: https://docs.servicenow.com/bundle/vancouver-it-business-management/page/product/time-card-management/reference/r_TimeCardManagementRoles.html 2: https://docs.servicenow.com/bundle/vancouver-it-business-management/page/product/project-management/reference/r_ActivityManagementRoles.html 3: https://docs.servicenow.com/bundle/vancouver-platform-administration/page/administer/form-administration/concept/c_FormAdministration.html 4: https://docs.servicenow.com/bundle/vancouver-platform-administration/page/administer/approvals/concept/c_Approvals.html