The correct answer is - B: high per capita income.
The United States is a country where the people, on average, have a very solid per capita income. Even though they are not ranked in the top countries by per capita income, still, the citizens of the United States have enough money to consume much more products than most of the people in the world. Also, a big influence on that has the fact that the prices for big portion of the products are very cheap, especially the food products. It is good that the people have enough money to satisfy their desires, but it also creates a big problem with obesity, and the United States are actually the leading country in obese people per capita.
