Given a cost function $C(Q)=1000+14Q+9Q^2+3Q^3,$ what $is$ the marginal cost function?

Hint: Marginal cost $is$ the derivative $of$ the Cost function.

$14Q+18Q^2$

$14+18Q+9Q^2$

$14Q+18Q+9Q^3$

$18Q+9Q^2$