Answer:
Option B, found between two impermeable layers
Step-by-step explanation:
A confined aquifer is one that is covered on both the sides by rocky structures which are non-permeable or it can be a water bearing stratum covered by a rock strata. Since it is covered on both sides, the water contained in it exists under pressure. Therefore, when a well is dug into it, the water rises due to pressure force.
Hence, option B is correct.