September 1995 LSAT
Section 3
Question 6
Kweb1016 on April 18, 2021
Answer choice B is incorrect because of one key word: small. Only a small amount of the city water results from underground water systems, which means that most of the city's water comes from other sources, possibly including reservoirs and streams. If most of the city's water comes from sources apart from the underground water system, than increasing the water supply of those very sources, which the argument says occurs, doesn't weaken the conclusion; if anything, the argument is strengthened.