Answer:
Ball can certainly hold Sullivan to a contract for sale of the land. Sullivan in his reply to Ball's enquiry offered to sell the forty-acre tract of land at $60,000 and nothing less. Ball accepted this offer by Sullivan by stating his acceptance.
These exchanges of offer and acceptance meet the terms of a valid contract. Therefore, Ball can always hold Sullivan for contract enforcement.
Explanation:
In making a valid contract, offer and acceptance are key ingredients, with specific consideration. Since the two parties, Ball and Sullivan are agreed on the consideration and have exchanged offer and acceptance, the validity of the contract is enhanced thereupon.