问题
It was not rare in _____ that people in _____ fifties went to university for further education[ ]
A:1980s; their
B: the 1980s; the
C: the 1980s; their
D: 1980s; the
B: the 1980s; the
C: the 1980s; their
D: 1980s; the
正确答案是：
