Hi how are you. Things will get better soon! Sending love!
I think it's health because it fits best in the sentence and situation
The brachial artery<span> is a major </span>blood<span> vessel located in the upper arm and is the main supplier of </span>blood<span> to the arm and hand. ... The </span>brachial artery's<span> pulse can be felt on the elbow's front side. This is why </span>blood pressure<span> is measured in this area using either a sphygmomanometer (a </span>blood pressure meter) or a stethoscope. the answer is >5 mm Hg
Atavism is the tendency to revert to ancestral type. So I'm thinking C.