What is the domain of the rational function f(x)= x²+x-6/x³-3x²-16x+48?
A. {x∈R|x≠-4,-2,3,4}
B. {x∈R|x≠-4,3,4}
C. {x∈R|x≠-4,4}
D. {x∈R|x≠-2,3}