Why Is Ensemble Acting, Which Emphasizes the Collaborative Interaction of a Group

Why is ensemble acting, which emphasizes the collaborative interaction of a group of actors, and not the work of an individual actor used less in the movies?

A) It requires the provision of rehearsal time that is usually denied to screen actors.
B) Film directors generally prefer individual acting moments over ensemble ones.
C) Actors generally do not want to share the screen with other actors.
D) Ensemble acting can reduce the emotional impact of a specific plot situation.
E) Ensemble acting does not lead to verisimilitude on the screen.