If you were to write the letter o, how many red blood cells could it hold

Umm I know its going to be a lot. The RBC count totals the number of red blood cells that are present in your sample of blood. but what do u mean if u write the letter O?

Explanation:

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.