Read the text and determine if the sentence is true (see options at the end):

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.

Sentence: Plaque is what hangs on the wall
Pick from:
(a). Yes
(b). It's impossible to say
(c). No