这道题整个不理解，能否麻烦具体解释下，包括知识点在哪里

问题如下：

Combining a protective put with a forward contract generates equivalent outcomes at expiration to those of a:

选项：

A.

fiduciary call.

B.

long call combined with a short asset.

C.

forward contract combined with a risk-free bond.

解释：

A is correct. Put−call forward parity demonstrates that the outcome of a protective put with a forward contract (long put, long risk-free bond, long forward contract) equals the outcome of a fiduciary call (long call, long risk-free bond). The outcome of a protective put with a forward contract is also equal to the outcome of a protective put with asset (long put, long asset).