Mr. London is a patient with an infectious disease who is in a long term care facility. His grandchildren are visiting him at the facility. The nurse assistant should:
A. remain quiet and let the visit proceed uninterrupted. B. instruct the family on the proper isolation technique. C. Refuse to let any visitors see Mr. London due to his serious illness. D. Ask Mr. London to visit with his grandchildren in the dining room so his room stays sterile.