Which of the following statements is true?
a. a marketing manager must allocate an advertising budget to promote the product least effectively.
b. managers are not constrained by resource scarcity.
c. human resource managers design compensation systems to encourage employees to work hard.
d. a production manager's objective is normally to achieve a production target at the highest possible cost.

C. Human resource managers design compensation systems to encourage employees to work hard.

Explanation:

Human Resources manager is in charge of the recruiting processes, the improvement of the company job environment and the welfare at work of the people who is involved with the company. According to the incentive theory, a person may be motivated by the  implementation of rewards to reinforce a good behavior. The human resources managers design compensation systems to reach their objectives of  strengthen  the good behaviour of the people for the improvement of the company job environment.

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