I believe the answer to your question would be young adults who want to stay healthy.
That in the medium you are trying to make the middle of the story sound different.<span />
Well, most slang words that have been used for a long period of time have been added to the dictionary, but then again, some other slang words have not. So, it really depends on the word.
But, for a straightforward answer i would say yes, just because some slang words are in the dictionary.
~Hope this helped
The answer is (c) note the main ideas. If you already note the main idea it will help you better.