Passage Summary: Salt usually makes blood pressure go up, and cutting it helps. However, some people eat a lot of salt and still have perfectly low blood pressure.

Reasoning: Salt generally raises blood pressure, and reducing it helps those with high blood pressure, but some high-salt consumers still maintain low blood pressure.

Analysis: The paradox here is a discrepancy between a general biological trend and specific outliers. We are told salt increases blood pressure, yet some people with high salt intake are unaffected. To resolve this, we need a piece of information that explains why these specific individuals are 'immune' to salt's typical effects. Look for an answer that introduces a mediating factor, such as a genetic predisposition or a counteracting lifestyle habit, that allows these people to maintain low blood pressure despite their diet.