A medical assistant is working in a family practice clinic when a patient requires an immunization. the physician takes the medical assistant aside and explains that it is a particularly busy day because the nurse has called in sick. the physician asks the medical assistant to administer the injection so she can proceed to the next patient. the medical assistant explains that it is not within the scope of practice in the state for her to administer an injection. the physician insists, saying she will take that responsibility. what should the medical assistant do?