Wilbur decides to sell his collection of rare stamps on ebay. when he is filling out the information for his item, he types $40 instead of $400 in the reserve price box. wilbur does not notice his mistake until after the auction is over and someone has purchased his stamp collection for $75. wilbur:

a. can rescind the contract because the stamps are worth much more than $75.

b. can rescind the contract because he made a unilateral mistake.

c. can claim he was defrauded.

d. cannot rescind the contract based on his unilateral mistake.