Duress Will Generally Be Made Out Where

Duress will generally be made out where:

A) B tells A: 'If you don't enter into the contract, I will shoot you', and A has no reasonable practical alternative but to enter into that contract.
B) B tells A: 'If you don't enter into the contract, I will tell mother that you were the one that broke her favourite vase', and A enters into the contract.
C) As a result of B's threats, A agrees to the contract because he does not want the hassle of falling out with B.
D) B persuades A to enter into a contract disadvantageous to A.