Mercer was getting bored with his job as a sales clerk in the home department until his manager gave him responsibility for training a new salesperson in his area which he likes to do. This is an example of .
A. management by objectiveB. the unity of command principleC. an intrinsic rewardD. an extrinsic rewardE. management by exception

B

Explanation:

The unity of command principles : This simply refers to an organizational designed to ensure that each employee or member of an organization reports to only one person above him or her. It also referred to as chain of command, and used in both military and law enforcement, but also in many other types of organization.

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