If you happen to spill a bacterial culture on the floor during lab, which of the following statements describes the correct clean-up procedure? a) Immediately wipe culture up with paper towels, then place them in the trash can. b) Saturate spill with bleach and let air dry. c) Sweep up the culture with a mop and broom. d) Immediately cover the spill with paper towels, saturate with disinfectant, then let sit for 15 minutes.