Is the quadniateral a square ?
I. All the sides of the quadrilateral are of equal length.
II. The diagonals of the quadrilateral are of equal length.

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.