What is the MOST common artery used to take a patient's pulse rate in the dental office?

The EMT shows she understands "Do Not Resuscitate" (DNR) orders and living wills when she states:

A) "A living will is a form of DNR; only a living will states exactly how the patient wants to be resuscitated." B) "A DNR applies to resuscitation issues only, such as when a patient stops breathing or the heart ceases to beat, whereas a living will pertains to long-term life support care and equipment." C) "If a patient has a valid DNR, the EMT should withhold all care and transport the patient to the hospital. If a living will is present, the EMT should do exactly what it says." D) "If the patient has a living will, it can legally be used as a substitute for a DNR order by the EMT as long as it is properly dated and signed."

When the practitioner suspects that a patient has a protozoal or parasitic infection, what is the minimum number of stool specimens that need to be examined?

A. 1 B. 3 C. 4 D. 5 E. 2