If \(c\ne -5,\) then \(\dfrac{5ab+abc}{abc^2+10abc+25ab}\) is equivalent to which of the following?
(A) \(\dfrac1{(c+5)^2}\)
(B) \(c+5\)
(C) \(\dfrac1{c+5}\)
(D) \(c-5\)
(E) \(\dfrac1{c-5}\)
Answer: C
Source: Manhattan GMAT
A
B
C
D
E