Sheldon, 17 years old, bought a new computer from the Dell store. Sheldon kept using the computer until he was 20 years old. He contacts Dell and tells them that since he was a minor (under 18 years old) he wants to disaffirm the contract. Which statement is correct? Group of answer choices Dell improperly denied Sheldon's request because Sheldon made his disaffirmance timely. Dell improperly denied Sheldon's request because Sheldon can disaffirm the contract at any time. Dell properly denied Sheldon's request because Sheldon expressly ratified the contract. Dell properly denied Sheldon's request because Sheldon impliedly ratified the contract