“一门三父子，都是大文豪，诗赋传千古，峨眉共比高。”这首诗中的“三父子”指的是[ ]

A．曹操、曹丕、曹植

B．苏洵、苏轼、苏辙

C．班彪、班固、班超

D．杜甫、杜牧、杜荀鹤

Speaker A: This exercise is really beyond me.
Speaker B: ().

A. When do you think you can work it out

B. Why not come to me

C. When did your teacher give you this math assignment

D. Our math teacher is too hard on us.