Simplify the Expression Involving Rational Exponents $\left(\frac{16}{49}\right)^{-1 / 2}$ A) $\frac{8}{49}$ B) $\frac{4}{7}$

Multiple Choice

Simplify the expression involving rational exponents.
- $\left(\frac{16}{49}\right) ^{-1 / 2}$

A) $\frac{8}{49}$

B) $\frac{4}{7}$

C) Not a real number

D) $\frac{7}{4}$