Aidan and Nadia Are Parties to a Contract That Allows

Aidan and Nadia are parties to a contract that allows Nadia to enforce an "acceleration clause" (as that term was used in the text) . Which of the following statements is most likely TRUE?

A) Nadia is concerned that Aidan may fall into a habit of failing to make loan payments on schedule.
B) Nadia is entitled to repay a debt to Aidan more quickly than their contract contemplates.
C) Nadia borrowed money from Aidan.
D) The parties' contract is subject to a condition precedent that requires Aidan to do something (such as arrange financing for the purchase) within a certain period of time.
E) Aidan is indebted to Nadia, but he cannot possibly be a mortgagor.