Which is a valid conclusion that can be drawn from these statements?
If a quadrilateral is a rhombus, then it is a parallelogram.
If a quadrilateral is a parallelogram, then its opposite angles are congruent.
A. Opposite angles of a rhombus are congruent.
B.Opposite angles of a quadrilateral are congruent.
C. Every parallelogram is a rhombus.
D. Every quadrilateral is a rhombus.