America's victory in the Revolutionary War was made more probable for the following four factors:


because George Washington was an excellent leader

through money, supplies, soldiers, and ships that were presented through foreign aid from France

because of serious blunders on the part of the British commanders

because the colonists were courageous in fighting for a cause in which they believed

because England hired the Hessian mercenaries

Verified Answer :

As far as I undersrood there can be more than one correct so, I consider these options as the most accurate :
because George Washington was an excellent leader
through money, supplies, soldiers, and ships that were presented through foreign aid from France

because the colonists were courageous in fighting for a cause in which they believed 

I'm sure it helps! Regards.

ALL of these factors contributed to America's success, EXCEPT:
1. because of serious blunders on the part of the British commanders
2. 
because England hired the Hessian mercenaries