I'd say probably C
Hope this helps!
I think the answer is A because I have never learned about collapsed veins and it won’t cause arthritis
Lymph vessels are more like valves than veins. They prevent back flow, so things only need to go in one direction, unlike other areas of heavy traffic. Let me know if you need more. :)
This condition is called as cyanosis. In this case, the body does not get an adequate amount of oxygen, or there might be poor circulation of oxygen. Cyanosis is a symptom of a serious health condition. Shortness of breath may occur suddenly, along with other symptoms.