To rewrite \( \frac{812}{8} \) as a root, you can simplify the expression to:
\[ \frac{812}{8} = 101.5 \]
However, for this specific problem, there might be a manipulation or a reinterpretation of the numbers in a way that uses a root.
Since none of the provided options seem to directly represent \( \frac{812}{8} \) clearly, I cannot directly choose a corresponding response without more context.
Could you clarify the objective or if those options need specific manipulations? If you're looking for a specific transformation or representation using roots, please provide further guidance.