On March 1, Al Agrees to Sell Barb His House

On March 1, Al agrees to sell Barb his house for $250,000. Barb pays a deposit of $15,000, and they agree that title will transfer and the price will be paid on April 30. The agreement is signed by both parties under seal. What is the consideration on Barb's part?

A) quantum meruit
B) there is no consideration
C) the deposit of $15,000
D) the promise to pay the $250,000
E) the seal