Square A B C D has side length 10. Point E is on \overline{B C}, and the area of \triangle A B E is 40 . What is B E ?

**Answer Choices**

A. 4

B. 5

C. 6

D. 7

E. 8

Square A B C D has side length 10. Point E is on \overline{B C}, and the area of \triangle A B E is 40 . What is B E ?

**Answer Choices**

A. 4

B. 5

C. 6

D. 7

E. 8