How do the questions need to be worded? Are you asking the questions or are they?
I'm pretty sure the answer is C because you need to let the child learn on his/her own.
Answer:
The number of heartbeats per unit of time, usually per minute. The heart rate is based on the number of contractions of the ventricles (the lower chambers of the heart). The heart rate may be too fast (tachycardia) or too slow (bradycardia).
Explanation:
