Answer:
The correct answer is "Reference group".
Step-by-step explanation:
In sociology, a reference group can be understood as a group of people that individuals use to compare themselves with.
Reference groups usually help the individual to shape his/her values, attitudes, behaviors and so on.
According to sociology the relationship that we as individuals have with society at large and with groups, in general, serves as an important tool to establish our own identity.
In this particular case, Jocelyn is a senior that plans to attend graduate school to study Sociology. She then begans to use graduate sociology student papers as standards in evaluating her own writing skills.
In conclusion, for Jocelyn, the graduate sociology students have become her reference group.