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