Use the Rules of Exponents to Simplify the Expression $x^{1 / 7} \cdot x^{6 / 7}$

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.
- $x^{1 / 7} \cdot x^{6 / 7}$

A) $\frac{1}{x}$

B) $x^{6 / 49}$

C) $x$

D) $x^{6 / 7}$