_________you’ve known the importance of it, you should try your best to do it.

A．So that

B．Now that

C．Now then

D．After that

某企业运用指纹识别机对员工进行考勤，以促进员工准时上下班。此项措施属于（）。

A.惩罚手段

B.忽略手段

C.正强化手段

D.负强化手段