Use the Laws of Exponents to Simplify Each Expression Using $4 ^ { - 3 } \cdot 4$

Multiple Choice

Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.
- $4 ^ { - 3 } \cdot 4$

A) 16
B) $\frac { 1 } { 64 }$
C) $\frac { 1 } { 16 }$
D) 64