In square A B C D, points P and Q lie on \overline{A D} and \overline{A B}, respectively. Segments \overline{B P} and \overline{C Q} intersect at right angles at R, with B R=6 and P R=7. What is the area of the square?
Answer Choices
A. 85
B. 93
C. 100
D. 117
E. 125