What is the most common blood type there is on humanity? (giving away points)

-O

Explanation:

negative o blood is the most common because about more than 50 percent of the earth has it and about 45.5 percent of people in hospitals all around the earth need transfusion blood and O or -O blood can save any type of blood

( plz mark me as brainliest, that would be most appreiciated )

can you me this person for the answer

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.