Ronen Acknowledges That Her Study Might Have Limitations for Generalizability

Ronen acknowledges that her study might have limitations for generalizability because

A) grinding only occurs in college settings and we do not know their applicability to older adults.
B) she conducted her study at only one university, located in a particularly part of the United States, and was inhabited by fairly privileged students.
C) grinding is a new phenomenon and we do not know how it represents the past or predicts the future.
D) she was the same age as the students and could not see beyond any biases caused by the fact that she was so similar to the people she was studying.