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