Use This Fact Situation to Answer the Related Questions That

Use this fact situation to answer the related questions that follow it. A and B are negotiating a settlement under which A is to give B money and in return B is to give A his house and his car.The negotiations are by faxes back and forth between A and B,who agree to put the settlement in writing.A prepares the written settlement agreement,which,unfortunately,does not refer to his house,so B quickly signs it.
In this situation,if A argues that the house was part of the settlement and was left out by mistake,

A) B need not give his house to A,because there really was no error by A at all.
B) B need not give his house to A,because the written settlement agreement superseded the negotiations.
C) B need not give his house to A,because it was not reasonable for A to have relied on the house as part of B's settlement obligation.
D) B must give his house to A,because B knew of A's error and took advantage of it.
E) B need not give his house to A,because that term is not in the written contract.