What is the value of ab?
I. a + b = 9
II. | a - b | = 5

A

if the statement I alone can give the answer to the question.

B

if the statement II alone can give the answer to the question.

C

if the statements I and II together are necessary to give the answer to the question.

D

if the statements I and II both are not sufficient to answer the question and additional information is necessary