Choose from options: Determine if the sentence is true based on the text below:
colonies form when plaque is killed

How to detect gum disease<br>Learn about the causes of gum disease. The condition actually begins with the deposition of plaque (a slimy substance) around the teeth. Plaque is the media where the harmful bacteria thrive and form colonies.
Options are: a. Yes. b. It's impossible to say. c. No.
c.