If a significant hazard is identified, for example a large crack in the sidewalk outside an office building, and controls cannot be immediately implemented to remediate the hazard (filling the crack), what temporary controls are appropriate to control the hazard? options: A) Place temporary signs in the area B) Ensure workers are aware of the hazard by means of an email or memo C) Both A and B D) The site should be closed and work should not recommence until the hazard has been permanently remediated