If $$22^{m + 1}, 2^{n + 2},$$ what is the value of $$m + n$$?

I. $$2^{3n -1} = 256$$

II. $$2^{m + 2n} = 256$$

A

If statement I by itself is sufficient to answer the question, but statement II by itself is not.

B

If statement II by itself is sufficient to answer the question, but statement I by itself is not.

C

If statements I and II taken together are sufficient to answer the question, even though neither statement by itself is sufficient.

D

If either statement by itself is sufficient to answer the question.