Which of the Following Is True of Quantitative Research

Which of the following is true of quantitative research?

A) The main techniques for gathering data are focus groups and in-depth interviews.
B) A highly trained professional is advisable for conducting interviews.
C) Questions vary in order and phrasing from group to group.
D) Many interviews are conducted in order to give a projectable scientific sample.
E) Hypotheses are developed and attempts are made to gain insight into the problem.