H D5 TS Q12 – Selective High School

Only 20 percent of those who received surveys in the mail responded. Therefore, sending surveys in the mail is not the best way to get a high response rate.

Which of the following, if true, most weakens the above argument?

Surveys were sent to people chosen at random. A large percentage of people who received the survey were not given enough information to respond properly. The survey did not require those who received the survey to fill in their surnames. Some of those who received surveys in the mail never opened up the envelope.

Are you sure you want to leave?

Which of the following, if true, most weakens the above argument?