Answer:
C - no antibodies
Explanation:
I dont think there is any blood type without antibodies
567000 would be in grams, hope this helps :)
Fewer option for consumers
It is important for the pH of blood to remain constant because your blood would ionize and burn up if the pH wasn't constant. And if the pH was too high, bacteria ( good and bad, and foreign) would end up dying, as well as yourself.