May 2020 LSAT Section 1 Question 7

Based on the passage, which one of the following most accurately describes the ideal characteristics of an undergroun...

Shemya-Key on April 6, 2021

Why B and not A

I chose the answer A because the question specifically asks "under what best condition" and it directly says that impermeable rock is. Could you explain why B is the answer and why A is wrong?

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NS1 on April 11, 2021

Same question^

Maria-Marin on June 9, 2021

If you look the passage, it says that the rock must be permeable, so it can absorb the wastes, therefore, answer choice B is better because it satisfies the condition of having a permeable layer and an impermeable one.