It can be inferred that the alternative approach to measuring happiness that is most different from the current approach is based on the belief that (A) GDP is a helpful measurement of how economics contribute to welfare in different countries (B) the sum of goods and services produced by a country is not a necessary factor in determining a country's well-being (C) material living conditions and life expectancy have no effect on individual happiness. (D) economic prosperity is a good predictor of life expectancy and is particularly useful for comparing life expectancyes around the world