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.
The answer is standard of living. Standard of living refers to the quality and quantity of products and goods available to a population at a given time. It is also defined as the level of wealth, comfort, material goods and necessities available in a certain geographic area or place.