Kevin Was Desperate to Save His Business Records and Equipment

Multiple Choice

Kevin was desperate to save his business records and equipment from the rising flood waters.Just then,a stranger with a large truck drove by,and Kevin,feeling that he had little choice,said,"I'll give you your choice of my equipment if you help me save my business records and equipment." The stranger agreed and chose some equipment and a laptop computer.After the flood,Kevin demanded everything back.The stranger refused to return the new laptop computer.On what legal grounds can Kevin get his computer back?

A) undue influence
B) duress
C) coercion
D) dire circumstances
E) no basis;this is a valid contract that has fair consideration on both sides