Firms pay famous individuals to endorse their products because

A. apparently demand is affected not just by the number of people who use a product but also by the type of person that uses the product. '
B. famous people only consume high quality products.
C. famous people obviously know what are the best goods and services.
D. the firms are irrational and are wasting advertising expenditures.

The correct answer is letter "A": apparently demand is affected not just by the number of people who use a product but also by the type of person that uses the product.

Explanation:

Demand is defined as the requests of good or services individuals make to satisfy their needs. Usually, demand is related to price while determining the fluctuations in the quantity demanded for a given product. However, price is not the only factor that impacts demand.  

Consumer preferences, income, and expectations, advertisements, and the number of consumers in the market also determine the demand for commodities.

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.

answer; synthetic production system;