Which of the Following Is FALSE Regarding Focus Groups

Which of the following is FALSE regarding focus groups?

A) Making decisions based solely on focus group research is risky.
B) Researchers usually recommend a minimum of 10 focus groups to find consistent opinions.
C) The group's size is very small, so the results are less likely to represent those of the population.
D) Opinions are very dependent upon a particular group's chemistry.
E) Conclusions drawn from focus groups are best tested using another more confirmatory approach.