Question: How to tighten a loose headboard on a bed?

  Options: 
 A. Leave the mattress on the bed and go on top of the bed, find the end of the leg which is causing the wobble and then tighten the bolt which is loose, that should fix the loose headboard
 B. Remove the mattress from the bed and go underneath the bed, find the end of the leg which is causing the wobble and then tighten the bolt which is loose, that should fix the loose headboard
Answer: B