An artesian aquifer occurs where ________
A) a water-bearing layer is trapped between two layers that are less permeable
B) granite is overlain by a sandy substrate, allowing percolation into the aquifer
C) a well is dug through layers of sand and gravel into the water table
D) several aquifers have merged
E) a water-bearing porous layer of rock, sand, or gravel has accumulated groundwater over a long period of time
Answer: A
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