The answer is All of the above
Http://www.sparknotes.com/biography/troosevelt/summary.html
Answer:
The primary purpose is to provide information to perform a task
It presents facts, principles, theories and reasoning related to a subject.
Explanation:
We can only refer to something as being functional if it is serving its intended purpose. In a more literal interpretation, if something is working. Hence, a text can be referred to as being functional if it useful, that is it serves its main purpose of providing the required information necessary to perform a particular task. Furthermore, it should give additional information regarding the facts, principles, and reasoning behind a particular topic, problem or subject.
The author's use of language in these sentences affect the passage in that the informal language in "sore heads" and "pulled and j*rked" indicates the author experienced the same treatment as the patients, giving the passage a resigned tone.
After seeing how the other patients were treated in shock, the narrator seems to hope for a salvation from such experience, but eventually accepts what comes and has no other choice than to give up to the suffering.