The least likely way to terminate a swap agreement prior to expiration is to:()

A. make/receive a payment to/from the original counterparty. 

B. sell the swap. 

C. enter into an offsetting swap.

在家畜生殖系统中，卵巢上有排卵窝的一种动物是（）。

A.猪

B.马

C.牛

D.羊

E.犬