Assuming Susie Does Not Take Willie at His Word and Wants

Assuming Susie does not take Willie at his word and wants additional assurance that her state's law would be applied,what should she do?

A) There is nothing she can do.
B) She should insert a forum selection clause in the contract.
C) She should insert a choice-of-law clause in the contract.
D) She should insert Hague evidence clause in the contract.
E) She should insert a GATT clause into the contract.