Which of the following is BEST suited for assigning resources to WBS tasks?

Which of the following is BEST suited for assigning resources to WBS tasks?

A.
WBS defines activities and deliverables that can be mapped to functional teams

B.
WBS defines the description of the end result delivered by the project

C.
WBS defines functional teams which should then be mapped to project scope items

D.
WBS contains the project schedule which should be used to determine timing of when to
engage functional teams