What is the value of $$b$$ ?
I. $$2 a - b = 3$$
II. $$a = b - (1 - a)$$

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.