Answer:
A. Social facilitation
Step-by-step explanation:
Social facilitation refers to the improvement in an employee's performance when working with friends and people in general over working alone. It involves the improvement in work by the mere presence of others. The improvement of the employee's performance has nothing to do with special training and the likes. It just involves allowing the employee to work with others rather than being alone. It points to the school of thoughts that people are motivated in working together rather than working alone. In this case, Hilary is placed in a team to work with her friend and others which has lead in the improvement of her performance.