In what way would you restrict the assigned to field on a project task to only allow users with resource allocations to

[answerhappygod]

In what way would you restrict the assigned to field on a project task to only allow users with resource allocations to be assigned?

A. Create an Access Control List (ACL) rule.
B. On the project record under the preferences tab select the “Derive assignee list from resource plan” preference.
C. The system automatically does this and can only be disabled by an admin.
D. Create a reference qualifier on the ‘assigned to’ field.