Use the Laws of Exponents to Simplify $\frac{4.9^{-5 / 14}}{4.9^{-4 / 7}}$

Multiple Choice

Use the laws of exponents to simplify. Write the answer with positive exponents.
- $\frac{4.9^{-5 / 14}}{4.9^{-4 / 7}}$

A) $4.9^{3 / 7}$
B) $\frac{1}{4.9^{3 / 7}}$
C) $\frac{1}{4.9^{3 / 14}}$
D) $4.9^{3 / 14}$