Answer:
a) Macroeconomists would be more likely to study inflation, and microeconomists would be more likely to study rent control in New York City.
Step-by-step explanation:
Macroeconomists would be more likely to focus on inflation because it is a large change that would affect the economy as a whole directly.
Microeconomists would be more likely to focus of rent control because while that may affect the economy as a whole, it would do so indirectly by affecting a small portion of the economy.