A, B, C, D are points on the circumference of a circle. What is the area of quadrilateral ABCD?
I) Radius of the circle is $$\frac{\sqrt{2}}{2}$$
II) ABCD is a square

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.