Which of the Following Is True Regarding the Adequacy of Consideration

Which of the following is true regarding the adequacy of consideration?

A) Courts generally consider the adequacy of consideration in determining whether to enforce a contract.
B) Courts consider the adequacy of consideration only if something is sold for less than 90% of its market value.
C) Courts consider the adequacy of consideration only if something is sold for less than 80% of its market value.
D) Courts consider the adequacy of consideration only if something is sold for less than 70% of its market value.
E) Courts seldom consider the adequacy of consideration but will do so if an item was sold for a low sum in order to avoid claims of creditors.