In the diagram given. $$\angle ABC = 90^\circ$$. Then what is the value of z?
I.The value of y is three times the value of z.
II.The value of x is half that of z.

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 statementaloneis not sufficient.

D

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