B. It makes the most sense
Hope this helps pls mark brainliest
If you like to run, it is probably the best, in my opinion. If you are
already running, keep it up. Run in moderation (forget the
marathons….think long term, not long distance).
follow me on instagram @_diana_ott_
<span>B. occur when a patient doesn't produce enough leukocytes.</span>
