Which of the Following Is True of Additional Exceptions to the Requirement

Which of the following is true of additional exceptions to the requirement of consideration?

A) Once a bankrupt debtor is granted a discharge, creditors have a legal right to collect the discharged debts.
B) According to the Uniform Commercial Code, an offer by a merchant in a signed writing to keep an offer open is good only when it has additional consideration.
C) Charitable subscriptions are unenforceable unless and until the institution to which the promise was made incurs obligations by relying on the promise.
D) A creditor who fails to file suit to collect a debt within the time limit set by the appropriate statute of limitations has the right to collect it.