An investor can exit a forward position prior to contract expiration by all of the following methods EXCEPT()

A. entering into an offsetting contract with the original counterparty or a second (different) counterparty. 

B. exercising the early delivery option. 

C. making a cash payment or accepting a cash payment by agreement with the original counterparty.

系统性红斑狼疮热毒炽盛证宜（），用（）加减。