What is the value of $$\frac{a^4 - b^4}{a^2b^2}$$?
I. $$a + b = 4$$
II. $$a - b = 2$$

A

if the statement I alone is sufficient to answer the question.

B

if the statement II alone is sufficient to answerthe question.

C

if both the statements I and II are sufficient to answer the question but neither statement alone is sufficient.

D

if both the statements I and II together are not sufficient to answer the question and additional data is required.