The correct answer is D, as during the baby boom in the United States, growing families increased the demand for products.
The baby boom was a demographic phenomenon during the period between 1946 and 1964, characterized by a notable increase in the birth rate, as it went from 132 million people in 1940s to 203 million in the 1970s. This phenomenon produced an increase in the demand for goods and services, due to the population increase that it generated.
