cds spread大于债券，为啥不是buy low sell high

问题如下：

If the CDS spread is significantly greater than the bond yield spread, what is the most appropriate action by the investor to take arbitrage?

选项：

A.

Buy the corporate bond and buy CDS protection.

B.

C.

Sell the corporate bond and buy CDS protection.

D.

Sell the corporate bond and sell CDS protection.

解释：

If the CDS spread is greater than the bond yield spread, sell the corporate bond, and sell CDS protection to borrow at less than the risk-free rate.