Answer:
B. the social facilitation effect
Step-by-step explanation:
Based on the scenario it can be said that the study that is being described has been officially given the name of the social facilitation effect. This effect is mainly defined as being the tendency of an individual to act or behave differently when there are others watching than when that individual is alone. This also affects how well the individual performs a certain task, usually performing better in front of a crowd if they have had lots of practice.