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.

In credit card receivable ABSs, principal cash flows can be altered only when the:
Option A:lockout period expires.
Option B:excess spread account is depleted.
Option C:early amortization provision is triggered.

Answer: C