I'm pretty sure the answer is D because STI's can also be transmitted through blood.
1.- Tell everything with detail and do not forget to mention anything that might possibly be related to your problem.
2.- Do not tell lies, for the solution to the lied problem and to the actual problem might be different and could cause you problems.
3.- Make things clear when talking to the healthcare professional.
I don't know if you were looking for any official rules but this ones do help.
Wish you luck!
The answer is C.Fruits and Vegetables are foods only available in certain regions and therefore difficult to get. Hope this helps!
The answer to that question is D