Use the Rules of Exponents to Simplify the Expression $\left(b^{4}\right)^{5 / 4}$

Multiple Choice

Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers.
- $\left(b^{4}\right) ^{5 / 4}$

A) $b^{5 / 16}$

B) $b^{9 / 4}$

C) $b^{5}$

D) $\mathrm{b}^{1 / 4}$