The answer is A because the heart pumps blood from the heart through pulmonary artery that is low in oxygen and high in carbon dioxide concentration, to the lungs.
AB- is the blood type that is least common and 0+ is the most common
B. sulfur tetrafluoride + water → hydrogen fluoride + sulfur dioxide
Treat the liquid as if it is hazardous. Inform your teacher/instructor so you will be notified of the proper disposal technique.
From all of the things to choose the one that isnt negative in its way is B. releases carbon
