The girl developed an interest in music at an early age,( )she began singing in school and church

问题描述:

The girl developed an interest in music at an early age,( )she began singing in school and church
choirs
A.when
B.which
C.in which
D.for which

C,age 属于特殊的先行词吧,应该用when =in which 引导.记不清了.