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 auto loan ABSs, the form of credit enhancement that most likely serves as the first line of loss protection is the:
Option A:excess spread account.
Option B:sequential pay structure.
Option C:proceeds from repossession sales.

Answer: A