Answer: An implied ratification occurs when a former minor does not specifically state that he affirms a contract entered into as a minor, but takes some action that is consistent with an intent to ratify the contract.
Implied ratification arises when the main body behavior vindicate a reasonable postulate that he/she permission to the representatives act.
Thus in this particular case where the former minor does not state but is consistent with an intent to ratify the contract.
Therefore, the correct option is (a).