To simplify the expression \( (c^{-7})^{1/7} \), we can apply the power of a power property of exponents, which states that \( (a^m)^n = a^{m \cdot n} \).
So, we can rewrite the expression:
\[ (c^{-7})^{1/7} = c^{-7 \cdot \frac{1}{7}} = c^{-1} \]
The expression \( c^{-1} \) can also be rewritten as:
\[ c^{-1} = \frac{1}{c} \]
Therefore, the equivalent expression is:
\[ \frac{1}{c} \]
So the correct response is:
1c (Start Fraction 1 over c End Fraction).