The area of a triangle whose height is 1 more than 6 times its base is 13 square feet. If the base of the triangle is x feet, which equation models this situation?
A. 6x^2 +x-12=0

B. 6x^2 +x-13=0

C. 6x^2 +x-26

D. 6x^2 +6x-26