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The concern is that habitual sweetener exposure recalibrates taste toward “very sweet,” leading to higher sweet-item consumption. To strengthen this, we need longitudinal evidence linking exposure to both shifting taste ratings and purchasing behavior, with appropriate controls. Option B provides exactly that: over a year, heavy users grow less fond of unsweetened foods and buy more sweet snacks than matched nonusers—directly connecting exposure, palate change, and behavior. Option A is irrelevant; discrimination between sweeteners doesn’t address palate calibration or consumption. Option C is too general and lacks a causal link. Option D lacks temporal depth and controls, making it impossible to infer change or causation. On Nelson–Denny strengthen tasks, identify the hypothesized pathway (exposure → taste preference shift → behavior) and select evidence that tracks the pathway over time with a comparison group, thereby supporting the policy-relevant implication.