Answer:
The answers are,
1. wages and benefits of employees
2. d. opportunity cost
3. d. specialization
Explanation:
Unions are formed to represent the interests of employees and for their job security and benefits.
The best answer is Opportunity cost as the others are related with the production. and fixed cost is a cost that you incur each month that does not change with the output.
Specialization leads to lower costs in production and because of that, lower opportunity costs.