Which Is NOT an Advantage of Using Surveys to Collect

Which is NOT an advantage of using surveys to collect information?

A) Surveys can be used to collect information from very large numbers of people.
B) Surveys can be used to determine causal relationships between variables.
C) Surveys can be administered easily either by telephone or over the Internet as well as in person.
D) Surveys can help collect information on sensitive topics because they can be answered anonymously.
E) Surveys can allow customers to help direct the direction of future innovative products.