$$Z_{1}$$ and $$Z_{2}$$ are complex numbers. Is $$Z_{1} + Z_{2}$$ real?
I) The real and imaginary parts of $$Z_{1}$$ and $$Z_{2}$$ are integers
II) $$Z_{1}$$ is conjugate of $$Z_{2}$$

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.