Which of the following statements is true about his friend

A．Writing exhausts his friend.

B．His friend collects a lot of things to write.

C．His friend always has enough material to write on.

D．His friend is doing research to write a paper.

下列文学体裁出现的先后顺序是（）

①楚辞

②赋

③词

④散曲

A.①②③④

B.①③②④

C.①②④③

D.①③④②