What is the value of $$\frac{x^2}{y^2} + \frac{y^2}{z^2}$$?

I. $$\left(\frac{x}{y} + \frac{y}{z}\right)^2 = 100$$

II. x = 2z

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.