If x, y, z are positive integers, is x + y + z divisible by 7?
I. x + y + z is an even number.
II. x = 4y - 11, z = 2y + 4

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.