The Asset Swap Spread Is

The asset swap spread is

A) The spread of the fixed rate over current Libor in an interest-rate swap.
B) The spread over Libor on the floating leg of a swap to exchange the return from a commodity for a floating rate.
C) The spread over Libor on the floating leg of an interest-rate swap combined with a fixed coupon asset, such that the package is at par.
D) The spread over Libor on the floating leg of an interest-rate swap combined with a credit default swap, such that the package is at zero value.