Write the expression as a single logarithm. Which of the following options correctly expresses the given expression?

A) 3log_a(y-4) - 5log_a(y+8)
B) 3log_a(y-4) + 5log_a(y+8)
C) log_a(y-4)^3 - log_a(y+8)^5
D) log_a(y-4)^3 + log_a(y+8)^5