Which of the Following Is an Example of Manipulation

Multiple Choice

Which of the following is an example of manipulation?

A) A salesman demonstrates his product's superiority over competitors' products to persuade a consumer to buy it.
B) A parent convinces a child to study by promising a reward if she is successful.
C) People decide to stop smoking as a result of an anti-smoking campaign that highlights the dangers of smoking.
D) A manager convinces employees to work longer hours by implying that the employees will otherwise lose an opportunity for promotion.