Which of the Following Is True About Survey Research

Which of the following is true about survey research?

A) It is least useful when trying to describe a very large population.
B) It makes ieasible to obtain very large samples.
C) Its findings are less generalizable than the findings of experiments.
D) A limitation is the inability to analyze more than two variables simultaneously.
E) An advantage is the ability to develop a deep feel for what respondents are thinking.