—You mean the position is still vacant?

—Yes, but you must know our job is very demanding.

—_______.

A．With pleasure

B．I don’t mind

C．Don’t mention it

D．That’s all right

玉簪、紫萼与大花萱草习性上最大的差别在于（）。

A.对阳光的要求

B.对温度的要求

C.对水分的要求

D.对土壤的要求