What category does macbeth fit into? a) tragedies b)romances c)comedies d)histories

The Answer That Would Be Most Likely It Is A) Tragedies 

B).Romances 
what category does Macbeth fit into

It is false that during exercise, the oxygen concentration in the blood increases to twice that of resting levels. As a matter of fact, the oxygen either stays the same or decreases, or it may increase slightly than it used to be when the person was resting, but it definitely does not double while exercising. Hope this helps. Let me know if you need additional help!