The answer B makes the most sense.
Infection of previous operation. The surgereon would need to go in and and remove the infection and possible a little more of the leg...
Sedentary is the answer I think hope this helps :D
-the dose, (how much you should take)
-when you should take the medicine
-how often you should take it
-the length in time you should take it
and
- how to take it (with food, w/o food)
The best and most correct answer among the choices provided by the question is the third choice "call 911"
Tachycardia = Too fast. A heart rate of more than 100 beats per minute<span>(BPM) in adults is called tachycardia. What's too fast for you may depend on your age and physical condition.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!