问题
About ________ of the students in Grade Nine this year were born in the ________.
A:three five; 1996
B:three fifths; 1990s
C:third fifth; 1997
D:third fifths; 1990s;
B:three fifths; 1990s
C:third fifth; 1997
D:third fifths; 1990s;
正确答案是：
