Which of the Following Would a Judge Indicate as Forming

Which of the following would a judge indicate as forming the basis of a common argument for setting aside a contract based on mistake that will rarely succeed in Canadian courts?

A) misunderstanding of the legal consequences of giving an oral guarantee
B) misunderstanding of the terms of an oral contract dealing with land
C) misunderstanding of the nature or type of contract signed by the party
D) misunderstanding that a contract is not to be performed within one year