Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Which of the following statements is true regarding mortgage-backed securities?
Option A:Insurance companies prefer the first-loss tranche.
Option B:When interest rates rise, prepayments will likely accelerate.
Option C:When interest rates fall, the low-risk senior tranche will amortize more quickly.

Answer: C