Students at a high school were polled about their opinion of the food in the school cafeteria. A total of 200 students were chosen randomly from among the student body and asked to fill out a survey. Out of the 200 surveys received, one question had the following responses:

Food is acceptable as it is: 54

Food is terrible and should be improved: 103

Food is excellent and should not be changed: 15

Identify the problem with the study.

A. The relationship between two variables implies one causes the other.

B. Nonresponse

C. Some of the sample data are missing.

D. The conclusion is based on a voluntary response sample.