Professional baseball dates from 1869 and had no close rivals in

Professional baseball dates from 1869 and had no close rivals in popularity until the ______.
A、1970s
B、1960s
C、1980s
D、1950s
【正确答案】：B
【题目解析】：Professional baseball dates from 1869 and had no close rivals in popularity until the 1960s.参见教材P253。