Country A has experienced a significant increase in its GDP per capita over the last decade. Which of the following is the most likely underlying cause of this economic growth?

The significant increase in Country A's GDP per capita likely comes from having more skilled workers in the economy. When a country invests in education and training, its workers become more knowledgeable and efficient. This skilled labor can create better products and services, which helps businesses grow and earn more money. For example, if Country A has more engineers and scientists, they can develop new technologies that increase productivity. As a result, the economy expands, and people earn higher incomes, leading to a rise in GDP per capita.