Select the correct answer. If no denominator equals zero, which expression is equivalent to (x+2)/(x²-16)-:(2x+4)/(x²+3x-4)?

A. (x-1)/(2(x+4))
B. (x-1)/(2(x+1))
C. (x-1)/(2(x-4))
D. (x+2)²/2(x+4)²