Answer:
C. 12 feet
Explanation:
We have been given that Carlos swam to the bottom of a pool that is 12 feet deep.
Since Carlos swam to the bottom of the pool, so his elevation will be
feet with respect to surface.
The opposite of Carlos elevation relative to the surface would be opposite of
feet that is
feet.
feet
Therefore, the opposite of Carlos elevation relative to the surface is 12 feet.