Answer:
B. A puncture-resistant bag that is marked with the biohazard symbol.
Step-by-step explanation:
Medical wastes include used syringes, thus it is important to use a "puncture-resistant bag" in order to prevent people holding the disposal bag from getting punctured. Once a person gets punctured, he'd most likely get infected by bloodborne pathogens. In order to increase the safety and awareness of people, a "biohazard" symbol is marked on the bag in order to give them a warning and to identify the disposed wastes.