Answer:
d. All of the above are correct.
Explanation:
Economists are scientists who study the processes of production, distribution, accumulation and consumption of material goods. They also look for factors directly related to restraint or moderation in spending, and factors related to savings. Economists study the notion of how societies use resources to produce valuable goods and how these goods are distributed among individuals.
Based on this, we can say that economists would study whether the US unemployment rate has fallen by two percentage points in recent years, but we can also say that they would study the following situations: