<span>d. Bleeding from the head after a fall
</span>Which one of the following conditions requires immediate medical attention?
NOT:
a. Muscle soreness after running a 10K
b. Black-and-blue marks on the shin
<span>c. Skin abrasions after sliding into home base</span>
I think is b i am really sure.
Answer: He should of used the heel of his hand instead of using his fist.
Explanation: Using the heel of your hand is better than using your fist while doing a compression because this allows you to apply more pressure.
Medical dictionaries is your answer