Social commentary has also been a preoccupation of American ____

Social commentary has also been a preoccupation of American ______, often addressing issues not discussed in the mainstream.
A、theater
B、music
C、pop song
D、cinema
【正确答案】：A
【题目解析】：Social commentary has also been a preoccupation of American theater, often addressing issues not discussed in the mainstream. 参见教材P252。