"Birds of a feather flock together" and "opposites attract" both characterize one aspect of the

Paid media channels usually have which of the following characteristic?

a. Their audiences are larger than free media channels. b. Their audiences are often not necessarily seeking the message. c. Their audiences are more educated than other media channels. d. Their audiences are more diverse than other media channels.

What principles or guidelines should you follow in choosing a topic for a classroom presentation? 

What will be an ideal response?