How to clean cork floors<br>Sweep regularly. Use a soft-bristled broom, a dust mop, or a vacuum cleaner with a soft brush attachment. Depending on how heavily you use the area, repeat 2-7 times a week, or whenever you notice it getting dusty.

Based on that paragraph can we conclude that this sentence is true?
sweep cork floors irregularly

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