Which of the Following Mistakes Is Most Likely to Prevent

Which of the following mistakes is most likely to prevent the creation of a contract?

A) A stockbroker is mistaken about the future value of a technology company and buys stock on that basis.
B) A house deal closes money and keys are exchanged,then both parties find out that the house had been completely destroyed by fire between the time of the original contract and the closing of the contract.
C) A grocery supplier fills an order for 5000 cans of beans but mistakenly sends only 500 cans.
D) A bean wholesaler ships 5000 cans of golden wax beans to a customer who thought that he was ordering 5000 cans of corn.
E) A person agrees to a standard form contract on the internet by clicking the mouse on the "I Agree" icon.