medium · LSAT Logical Reasoning
To combat rising obesity rates, several large school districts replaced high-calorie snacks in their vending machines with low-calorie, healthy options. A follow-up study found that the total number of calories consumed from snacks by students in these districts actually increased during the following year.
Which one of the following, if true, most helps to resolve the apparent paradox?
- Believing the new options were healthy, students felt licensed to eat them in far greater quantities, so the larger volume more than offset each snack's lower calorie count.
- The school districts also introduced, at the same time as the new snacks, a daily mandatory physical education class that every enrolled student was required to attend.
- Many students continued to bring their own high-calorie snacks from home, eating those treats throughout the day alongside the healthier offerings stocked in the machines.
- The healthy snacks were deliberately priced well below the high-calorie snacks they replaced, an arrangement intended to nudge students toward buying the better options.
- Nutrition labels on the new snacks listed their per-serving calorie counts far more prominently and legibly than the labels on the old, higher-calorie products ever had.
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