Which of the Following Situations Would Not Constitute a Ratification

Which of the following situations would not constitute a ratification of a contract by a minor?

A) Prior to reaching majority, a minor expressly agrees to be bound by the terms of the contract.
B) After reaching majority, the minor fails to disaffirm the contract within a reasonable time.
C) After reaching majority, the minor expresses in writing an intention to be bound by the terms of the contract.
D) After reaching majority, the minor expresses orally an intention to be bound by the terms of the contract.