Which of the following is adequate consideration?

A) A preexisting duty
B) Agreement to settle an unliquidated debt
C) A preexisting moral obligation
D) Nominal consideration

Unliquidated Debt

A debt for which the exact monetary value has not been determined, often due to the nature of the claim or disputes over the amount.

Preexisting Duty

A legal concept referring to a duty that a party is already legally obliged to perform, which cannot serve as consideration for a new contract.

Adequate Consideration

A value that is fair and reasonable under the circumstances for both parties involved in a contract, not necessarily equal in monetary terms but sufficient to support the agreement.