The Concept of Capacity

The concept of capacity

A) means the legal power that we all have just to walk away from any contractual obligation on the basis that we did not understand the contract that we signed or otherwise entered into.
B) means that the law requires parties who enter into contracts to have a legal capacity to enter into contracts, and not everyone in society necessarily has that capacity.
C) refers to when one party is mistaken about the terms of a contract.
D) refers to pre-contractual statements.
E) requires all contracts to be in writing.