Answer:
<em><u>Not sharing water bottles </u></em>
Explanation:
Assuming what you mean by cold sores is herpes, it will defiantly be not sharing water bottles.
A subjective experience of multiple physical symptoms with no organic cause
The cells of the SA node at the top of the heart are known as the pacemaker of the heart because the rate at which these cells send out electrical signals determines the rate at which the entire heart beats (heart rate). The cells that create these rhythmic impulses, setting the pace for blood pumping, are called pacemaker cells, and they directly control the heart rate. They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. Hope this helps!
C. a person who is in a monogamous relationship and has protected sex.
