Use the Laws of Exponents to Simplify Each Expression Using $$\left( - 3 x ^ { 5 } y ^ { - 6 } \right) \left( 5 x ^ { - 1 } y \right)$$

Multiple Choice

Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.
- $$\left( - 3 x ^ { 5 } y ^ { - 6 } \right) \left( 5 x ^ { - 1 } y \right)$$

A) $\frac { 2 x ^ { 4 } } { y ^ { 5 } }$
B) $- 15 x ^ { 4 } y ^ { 7 }$
C) $\frac { - 15 x ^ { 6 } } { y ^ { 7 } }$
D) $\frac { - 15 x ^ { 4 } } { y ^ { 5 } }$