Opie Enters into a Contract with Pia

Multiple Choice

Opie enters into a contract with Pia. Later, Opie is adjudged mentally incompetent and Quint is appointed Opie's guardian. Raye, Opie's daughter, attempts to void Opie's contract with Pia on the ground of Opie's incompetency. The contract is

A) enforceable if Opie does not attempt to disaffirm it.
B) enforceable if Pia is also incompetent.
C) enforceable if Quint knew of the contract when he was appointed.
D) void.