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?

✓ Correct Answer: Option A

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 peaks in colder months, making January a likely candidate for the largest proportion if other consumptions remain stable or decrease.