He is a thoughtful and qualified father; He ____some time every day to read to his children.

A．sets down

B．sets off

C．set out

D．set aside

请判断正确的说法（）

A.整个妊娠期间不适宜牙科治疗

B.整个妊娠期间均适宜牙科治疗

C.妊娠前3个月适宜牙科治疗

D.妊娠4～6个月适宜牙科治疗

E.妊娠后3个月适宜牙科治疗