On March 1,Al Agrees to Sell Barb His House for $250

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