Which statement best distinguishes a confined aquifer from an unconfined aquifer?

• A. An unconfined aquifer is overlain by a confining layer and is under pressure.
• B. A confined aquifer is not overlain by a confining layer and water level rises with recharge.
• C. A confined aquifer is overlain by a confining layer and is under pressure; an unconfined aquifer is not overlain by a confining layer and water level rises and falls with recharge.
• D. An unconfined aquifer is always deeper than a confined one.

Answer: (C)