Which of the following mortgage-backed security derivatives is correctly defined? Group of answer choices below:

A. Planned amortization class tranches allow prepayments at only one specified speed.

B. Targeted amortization class tranches allow prepayments at only one specified speed.

C. An interest-only tranche performs better when prepayments speed up.

D. A principal-only tranche performs better when prepayments slow down.

E. The interest rate on a floater tranche moves in the opposite direction from market rates.