The behavior which demonstrates courtesy toward others in the workplace is, consulting with a coworker before intervening in one of his or her projects.
Answer: Option D.
Explanation:
Courtesy is being polite and kind. It means showing politeness in ones behavior. So the most appropriate behavior of courtesy in workplace is mostly certainly consulting before involving in his/her project.
Asking before intervening is important so as to avoid any conflict between the workers and it is also a good gesture towards other co workers. This thus demonstrates the courtesy towards others. Consulting shows respectfulness towards the other person, thus resulting in courtesy behavior.
