Answer:
The correct option is C) 1 over 6 to the 8th power.
Explanation:
Consider the provided expression.
6 to the negative 3rd power over 6 to the 5th. This can be written as:

Apply the exponent rule:

By using the above rule.



Hence, the simplified form is

Thus, the correct option is C) 1 over 6 to the 8th power.