Apply the Product Rule for Exponents, If Possible $\left(-3 x^{5} y\right)\left(-4 x^{9} y^{2}\right)$

Multiple Choice

Apply the product rule for exponents, if possible.
- $\left(-3 x^{5} y\right) \left(-4 x^{9} y^{2}\right)$

A) $12 x^{45} y^{2}$
B) $12 x^{14} y^{3}$
C) $12 x^{15} y^{3}$
D) $-12 x^{14} y^{2}$