The 1934 Study by LaPierre in Which He and a Chinese

The 1934 study by LaPierre in which he and a Chinese couple attempted to eat at a number of restaurants and stay at a number of hotels across the United States showed that:

A) The majority of restaurants and hotels refused them service when they visited.
B) The majority of restaurants and hotels accepted their reservations when they wrote and asked for accommodations.
C) The attitudes of the restaurant and hotel managers did not match their behaviors.
D) All of the above