The USDA would be the correct answer, hope this helps
I think the answer youre looking for is the nervous system
The best treatment is endoscopic therapy to achieve haemostasis. The patient is also given vitamin K to promote clotting while at the same time heparin is stopped.
Definitely not performing the act would decrease your chances of catching an STD superbly. The only other way you'd get an STD would be for you sharing some bodily fluid say during needle sharing, for those that spread through such means. Your answer is C
Correction* Vaccinations and Mutual Monogamous relationships, also reduce the risk for STDS