Which of the Following Is Not an Advantage of Survey

Which of the following is not an advantage of survey research?

A) survey researchers have a great ability to identify their own limitations and correct them.
B) survey research is a good way to learn about a large portion of the population by studying a smaller portion of that same population.
C) surveys are good at telling us about the hidden, secretive, and embarrassing events in people's lives.
D) survey are a good way to learn about people's attitudes, values, and opinions.