Afemale patient with a suspected head injury has slow, shallow breathing. the most appropriate treatment for her includes:

 the most appropriate treatment for her includes: ventilation assistance to maintain an oxygen saturation of 90%.
In this case, the patient is exposed to the risk of Hypoxia (defficiency of oxygen that reach the tissue), so, oxygen saturation need to be maintained to above 90% at least until emergency department arrived

The correct answer would be: c. ritalin