Use Properties of Rational Exponents to Simplify the Expression $\frac { x ^ { 4 / 3 } x ^ { - 3 / 4 } } { x ^ { 2 / 7 } }$

Multiple Choice

Use properties of rational exponents to simplify the expression. Assume that any variables represent positive numbers.
- $\frac { x ^ { 4 / 3 } x ^ { - 3 / 4 } } { x ^ { 2 / 7 } }$

A) $x ^ { 73 / 84 }$
B) $\frac { 1 } { x ^ { 25 / 84 } }$
C) $\frac { 1 } { x ^ { 73 / 84 } }$
D) $x ^ { 25 / 84 }$