Use Properties of Rational Exponents to Simplify the Expression $\left( y ^ { - 7 / 8 } \right) ^ { - 1 / 3 }$

Multiple Choice

Use properties of rational exponents to simplify the expression. Assume that any variables represent positive numbers.
- $\left( y ^ { - 7 / 8 } \right) ^ { - 1 / 3 }$

A) $\frac { 1 } { y ^ { 29 / 24 } }$
B) $y ^ { 7 / 24 }$
C) $\frac { 1 } { y ^ { 7 / 24 } }$
D) $\mathrm { y } ^ { 29 / 24 }$