Which household supply would be appropriate when cleaning a keyboard?

A) Upright vacuum
B) Damp, lint-free cloth
C) Bleach
D) Glass cleaner

A damp, lint-free cloth is the best choice for cleaning a keyboard as it can effectively remove dust, debris, and other contaminants without damaging the keys or the internal mechanisms. Using an upright vacuum, bleach, or glass cleaner can all potentially harm the keyboard and are not recommended.