If x and y are integers then is z an even integer?
I. $$z = (x + y)^2$$
II. $$z = 2x + 8y$$

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 not sufficient

D

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