Social Cognitive Theory is the view that individuals learn by watching others. In terms of Psychology, it clarifies identity as far as how a man contemplates and reacts to one's social condition. So we can say that it will only be effective if expect that this consequence will follow their good behavior.
An awner that I THINK it is b tho
The answer is non-sampling errors.
Non-sampling errors refer to any type of error/mistakes in data collection process that does not involve to the sample selection itself, which cause the data not truly representing the value in sample population.
Other example of a non-sampling error is when there is a member of research team that purposely changing the data.