Question

A representative from the zoo decided to interview teenagers at the horse show to determine the favorite type of animal among teens. Which statement best explains why the results of this survey may not be valid?
A.The survey should have been conducted by mail.

B.The group surveyed consisted only of teenagers.

C.The survey was conducted by a representative of the zoo.

D.The group surveyed consisted only of teenagers who attended the horse show.

Answer 1

 I think the answer should be D. The group surveyed consisted only of teenagers who attended the horse show.

Answer 2

I believe the correct answer is D.
Hope this helped