If $$x, y, z \epsilon ℝ$$ and $$z \neq 0$$.What is the value of $$\frac{xy}{z^{2}}$$
I. $$x = y$$
II. $$x^{2} + y^{2} = 0$$

A

if the statements I alone is sufficient to answer the question.

B

if the statements II alone is sufficient to answer the question.

C

if the statements I and II together 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 an answer the question and additional data is required.