If x is an integer, is $$9^x + 9^{-x} = b$$
I. $$3^x + 3^{-x} = \sqrt{b + 2}$$
II. $$x > 0$$

A

If the statement I alone is sufficient to answer the question

B

If the statement II alone is sufficient to answer the 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.