Which of the Following Contracts Is Void

Which of the following contracts is void?

A) a contract to sell a crop of marijuana growing in a particular field
B) a contract containing an exculpatory clause limiting the liability of one of the parties
C) a contract with an insane person for a TV,where the insane person,or his or her legal representative,can prove that he or she was insane at the time of the contract but cannot prove anything else about the incident
D) a contract with an insane person for necessaries such as food and shelter
E) any contract with a status Indian