Final answer:
The percentage of the population under 20 years of age in Country 1 is closest to option C, 28%, based on the demographic data provided which indicates an actual percentage of 26.4% for those 19 and under.
Step-by-step explanation:
When reviewing the percentages of different age groups across various populations and trying to determine the percentage of the population that is under 20 years of age in a specific country, we are addressing a question related to demographics and population statistics, which falls under the subject of Mathematics. In this case, data from different countries and age distributions are provided, but for Country 1, the most relevant information is given in a line stating "19 and Under" with corresponding percentages for different years. Based on the provided data for the most recent year listed, it shows 92.6 (26.4%). Therefore, if we are looking for the percentage of the population under 20 years of age in country 1, the closest match from the options given is option C, 28%.
Although this doesn't exactly match any of the provided percentages, we must choose only one option that is closest to the provided data. Option C is the most reasonable choice as it is nearer to the actual percentage of 26.4% than the other options. Hence, the answer is 28%, reflecting the closest available option to the actual data presented.