For Put Options, the Delta Has a Negative Sign

Multiple Choice

For put options, the delta has a negative sign

A) since the value of the put option falls when bond prices rise.
B) since the value of the put option rises when bond prices rise.
C) since the value of the put option falls when bond prices fall.
D) since the change in interest rates is equal to the change in the interest rate on the bond underlying the option contract.
E) to adjust for basis risk.