When a Studio Engaged in Block Booking, It ______

When a studio engaged in block booking, it ______.

A) opened a big-budget film in at least one thousand movie theaters across the United States
B) hired an entire neighborhood or category of people to appear in a film
C) guaranteed an exhibitor that a film would attract a minimum number of paying customers
D) required exhibitors to book a large number of new or marginal pictures in order to get the movies they really wanted
E) required movie actors to sign exclusive contracts