Answer: (A.)The employment contract specifies the level of work effort required from a worker.
(C.) The buyer in the labor market is a price setter.
Step-by-step explanation:
In a economy the employment contract specifies the level of work effort required from a worker. i.e. while hiring an employee for a position in a organisation, It is required to completely specify the level of work effort required from that worker.
Also, Firms interact with individuals, employing them, discharging them and promoting or cutting wages and hours. The relationship between the forces of supply and demand influences the hours the worker works and their compensation.