Respuesta :
For this item and the choices we are given, I go with nonresponse. Thus, the answer is letter B. This process of surveying is one of the best there is; however, it faces the disadvantage that not every owner of the homes who have chosen may be kind enough to lend you some of their time to answer the questions.
Answer:
Yes, it is biased. Some of the residents who are surveyed may not want to respond to someone who knocks at their door.
Explanation: