Which of the following people could tell the difference between a cultured pearl and an organic pearl

A．Scuba diver.

B．Fisherman.

C．Jeweler.

D．Clerk.

具有疏肝解郁、调经止痛、理气调中功效的药物是（）。

A.川楝子

B.沉香

C.香附

D.木香

E.枳实