Which of the Following Is Not a Requirement of Common

Which of the following is not a requirement of common mistake?

A) There must be a common assumption as to the existence of a state of affairs
B) There must be no warranty by either party that the state of affairs exists
C) The non existence of the state of affairs must not be attributable to the fault of either party
D) The non existence of the state of affairs must render performance of the contract inconvenient