How to remove varnish<br>Create good ventilation. Whether your sanding or using a chemical solvent, it's a good idea to have ventilation. Open windows and use fans to create cross-ventilation if you're inside.

Based on that paragraph can we conclude that this sentence is true?
It is not a good idea to use ventilation while sanding.

OPT:
 (a). Yes
 (b). It's impossible to say
 (c). No
(c).