Why are sharps containers designed the way they are? A. They are designed to clean used needles and make them reusable. B. They are designed so used needles can be inserted but not removed, reducing the risk of needle sticks. C. They are designed so that needles are exposed enough for the health care provider to sterilize them. O D. They are designed so that needles can be emptied, like a trashcan, to increase efficiency in clean up.