What is the sum or difference to these problems?

(5h^3+8h-9)-(6h^3+6h-4) A.-h^3+2h-5 B.-h^3+2h-13 C.-h^3+14h-13 D.-h^3-2h-5 (6q^5+8q^2+3)+(8q^5-3q-7) a.-2Q^5+8Q^2-3Q+10 b.14Q^5+8Q^2-3Q-4 c.-2Q^5+8Q^2+3Q+10 d.14Q^5+5Q^2-4