What values of the variable make a true equality?

A) (x² + x) / x = x + 1

B) (3y² + 4y + 1) / (y+1) = 3y + 1

C) (x² - 4x - 5) / (x - 5) = x + 1

D) (3a² - ac + 2c - 6a) / (3a - c) = a - 2