Out of all given options, the terms seems to describe the change in Michelle's behavior is social loafing.
Answer: Option B
Step-by-step explanation:
Social change denotes about the concepts that people work lesser in a group than working alone. When working in groups, an idea is usually seen as a way to improve a task by combining the skills and talents of individuals in that group. However, in some groups, participants usually contribute less into the group's goal than they do the same task. It has negative consequences for the group and its people.
The dynamics of the group is affected by the situation when some people are seen as weak participants in the goal. This divides the group and creates a lack of consistency. For example, consider the given situation. In that, Michelle’s action be like Dannie will take care of all and so no need to exert his efforts. So, the best term to describe his action is option B.