I believe the answer is A becuase working at a lemonade stand helps you kinda run a business if you think about it
Answer:
The correct answer is option D.
Explanation:
Academic book publishers hire editors, designers, and production and marketing managers who help prepare books for publication.
These employees work on several books simultaneously so a change in quantity demanded of books published in a year.
Since the number of people employed is fixed and does not change with the quantity of output. The cost incurred on these workers will be fixed cost. So the salaries and benefits of people in these people will be included in fixed costs and total costs. But since it does not change with change in the output it will not be included in variable costs.