A study was conducted on 100 randomly selected chefs in the United States. The study consisted of a survey that the chefs had to fill out and send in. All surveys were returned, but on one of the questions on the survey concerning salary only 70 chefs answered. Identify the problem with this study.
A. The conclusion is based on a bad sample.
B. A nonresponse occurred.
C. This is a self-interest study.
D. The relationship between two variables implies one causes the other.