Which of the Following Is True Regarding the Preexisting Duty

Multiple Choice

Which of the following is true regarding the preexisting duty rule?

A) Unforeseen circumstances and past consideration are exceptions,but additional work is not an exception.
B) Unforeseen circumstances and additional work are exceptions,but past consideration is not an exception.
C) Unforeseen circumstances are an exception,but additional work and past consideration are not exceptions.
D) Additional work is an exception,but unforeseen circumstances and past consideration are not exceptions.
E) Past consideration is an exception,but unforeseen circumstances and additional work are not exceptions.