When people earn more money, this can have a direct impact on the for a particular good or service. * supply
need
demand
opportunity cost

Demand due to increased income increased sales

Demand because can lead to a high demand for products and services. As the demand for a particular good or service

Explanation:

The correct answer is B. Stalin's first five-year plan resulted in a boom in heavy industry.

Explanation:

The first five-year plan was decided in 1928 and applied to the period 1929 to 1933. The five-year plan was the tool that Stalin, after clearing the Trotskyst opposition and gaining absolute power in the Soviet Union, introduced to accelerate industrialization. In these five-year plans, the Soviet Union's economy would be planned for five years to come. The first plan had an immense goal: over five years, total industrial production would increase by 250 percent, agricultural production by 150 percent, investment by 220 percent and consumption by 70 percent. In doing so, Stalin also abandoned Lenin's new economic policy (NEP), which Stalin previously defended from Trotsky's criticism. Stalin began by focusing on the heavy industry, the light industry (clothes, detergents, etc.) came second.