Why not try another way _____ you may do your experiment better and more quickly? [ ]

A. by which

B. that

C. which

D. in that

《城乡个体工商户管理暂行条例实施细则》第六条所列登记的主要项目中：经营方式：包括（）。

A.自产自销、代购代销、来料加工

B.零售、批发、批零兼营

C.客运服务、货运服务、代客储运、代客装卸

D.修理服务、培训服务、咨询服务等