In rhombus A B C D, point P lies on segment \overline{A D} so that \overline{B P} \perp \overline{A D}, A P=3, and P D=2. What is the area of A B C D ? (Note: The figure is not drawn to scale.)
Answer Choices
A. 3 \sqrt{5}
B. 10
C. 6 \sqrt{5}
D. 20
E. 25