The correct answer would be A.
As shown in the chart, product markets, individuals, factor markets, and businesses are all interconnected within the American economy. This is simple to understand based on the following scenario.
Businesses create goods (products) in order to be bought by consumers (individuals). The choices of these individual citizens are affected by factor markets (pricing, advertisement, etc.). These factor markets play a critical role in determining what businesses make.
Based on this example, you can see how all of these factors rely on each other.