Is there only one answer to the question? If so, I would guess communicating. Although analyzing influences and setting goals could be correct as well.
A factor that can influence how a person respond to a drug is their age,having a high fat diet, and digestive disease.
The best would be to pay with cash payment on delivery because then people cannot access your credit card information and steal your identity. Hope it helps! :) If you could vote my answer as the brainiest, that would be awesome! :)