Beta agreed to provide security guards to patrol Alpha's facilities during the month of October, for which Alpha agreed to pay Beta $4,000 at the end of October. At the end of October, however, Alpha refused to pay Beta $4,000 because Beta's security guards had left early or failed to show up on several days. Alpha argued that it only owed Beta $2,000 for the services actually provided. If Alpha agrees to pay, and Beta agrees to accept, $3,000 as payment in full for Beta's services to Alpha, is that agreement enforceable?

Group of answer choices

Yes, because this is an agreement to settle an unliquidated debt

No, because this is an agreement to settle a liquidated debt

No, because Beta's services are past consideration for the modified agreement

No, because the agreement is not in writing.