A quadrilateral is inscribed in a circle. Which statements are correct? Select all that apply.

a. The circle is circumscribed about the quadrilateral
b. Each vertex of the quadrilateral lies on the circumference of the circle.
c. Opposite angles of the quadrilateral are supplementary.
d. Consecutive angles of the quadrilateral are supplementary.
e. Consecutive angles of the quadrilateral are complementary.