An additional risk of an investment in an arbitrage collateralized debt obligation relative to an investment in an asset-backed security is:

A. The default risk on the collateral assets.

B. The risk that the CDO manager will fail to earn a return sufficient to pay off the investors in the senior and the mezzanine tranches.

C. The risk due to the mismatch between the collateral making fixed-rate payments and the bond classes making floating-rate payments.