Acceptable answers could be A because if it's on the side people will feel less tempted to eat it and will eat less. C techinally could be correct but i don't think it's the answer.
What/who it effects, what does the path to the outcome look like.
Example: your friend asked if her dress looked good on her and you said no. this hurt her feelings but you were trying to help by being honest.
A is the answer I've had this question before also on a health work sheet
Diseases or other disorders can be passed down through your family so you need to know your families history to know if you are at an increased risk.