The answer is D. Directly to the lungs
Command procedures is like surgery and your being told what to do by a doctor
hope this helps
Anything in the mouth, really. Gingivitis, for example. By brushing your teeth regularly (in the mornings, after lunch, dinner, at night etc.) you can prevent this i.e Good Hygiene. A common prescription medication would be <span>Erythromycin or Penicillin.
Hope this helps!</span>
A the spinal cord and central nervous system are developing