Why must researchers avoid generalizing from focus group participants to the whole market？（ ） A: Participants' responses are not reliable. B: Most of the participants are likely to be ignorant about the topic of discussion. C: The size of the group is too small and the sample is not drawn randomly. D: Most of the participants are likely to exhibit similar tastes and preferences. E: The participants usually come from diverse backgrounds.

Match the items in Group 1 with its corresponding description in Group 2.

Marketers are always looking for emerging trends that suggest new marketing opportunities. One such trend is the “metrosexual.” Which of the following items would the metrosexual most likely have some interest for?

Most speeches contain _____ main points.

Which of the following subtitles is most likely to contain the information of how to take down notes in class?(  ) A: Going to lectures and seminars B: Doing research C: Studying in an effective way D: Doing assignments