X and Y have a contract, which obligated X to sell Y 100 boxes of screws for $100. The parties orally modify the contract so that X will sell Y the same 100 boxes of screws for $125. The second agreement is:

Multiple Choice

binding because it is due to unforeseeable situation.

binding by virtue of being mutually agreed on.

not binding because it is an outputs contract.

not binding due to the promise of performing a preexisting legal obligation.