It gives his life a flying start _____ he has gone abroad for further education. [ ]

A. what

B. when

C. that

D. how

和谐社会应当致力于在从源头上减少纠纷产生的基础上，通过建立完善的纠纷解决制度来公正、及时、妥善地解决所有纠纷。