C. Realistic. If your goals are not realistic, then they are un-achievable and you will not make it.
Answer:
Rephrase rather than repeat, if the person doesn't understand what you're saying. Use non-verbal communication to help (eg pointing at a picture of someone you are talking about). If the person becomes tired easily, it may be better to opt for short, regular conversations.
Explanation:
Prescribing medicine is for doctors to do you can recommend otc meds not prescribe them
I'm not sure on this one... Maybe Carbon Dioxide?
In case you want to go in to a work field consisting the body also so you can get a better understanding of it.