Multiple choice question

Which of the following is correct about consideration in commercial contracts?

a) consideration is usually required for commercial agreements to be enforceable contracts, except in the case of deeds.

b) Consideration is always present in commercial agreements, so doesn't ever lead to any problems in relation to forming commercial contracts.

c) When agreements are in writing, the fact that they are written shows that they are serious and consideration is not required for there to be a binding contract.

d) Consideration is always required for promises to be enforceable, even in the case of deeds