A stacked bar chart illustrates the monthly energy consumption breakdown (Electricity, Natural Gas, Water) for a factory over a year. In which month did Natural Gas constitute the highest percentage of the factory's total energy consumption?

The correct answer to the question "A stacked bar chart illustrates the monthly energy consumption breakdown (Electricity, Natural Gas, Water) for a factory over a year. In which month did Natural Gas constitute the highest percentage of the factory's total energy consumption?" is Option A: January.

The other options — B) April, C) July, D) October — are incorrect for this GMAT Exam Prep question. As explained above: To determine the highest percentage, one must visually compare the proportion of Natural Gas (often the middle segment) to the total height of the bar for each month. Typically, Natural Gas usage pea…