Evaluate (dy)/(dx) and (dy)/(dx)|_(x) if y=(x+7)/(x+1). Simplify your answer.

A) (dy)/(dx) = 3, (dy)/(dx)|_(x) = 3
B) (dy)/(dx) = 3, (dy)/(dx)|_(x) = 0
C) (dy)/(dx) = 0, (dy)/(dx)|_(x) = 3
D) (dy)/(dx) = 0, (dy)/(dx)|_(x) = 0