I believe the answer is a
Answer:Social facilitation
Explanation:Social facilitation is the tendency appearing in the individual that helps the particular person to perform better than earlier and well than the usual times in any certain field.
Social facilitation boost the mental energy of a person helps the person to perform well in the simple task .It also might lead to the worse performance in the task which are new to the person or has complexity. Bill also felt this emotion while playing the presence of his family.
