Answer: The correct answer is "A. countries with high purchasing power today may not continue to show the same growth in the future.".
Explanation: Based on population growth rates in different regions, she should consider that countries with high purchasing power today may not continue to show the same growth in the future because based on the information and statistics it uses, such as market sizes and population growth, it can be seen that those countries with high purchasing power over time do not have the same growth in the future.