Answer:
Correct answers are:
a He retreated when necessary to save the army.
2. a The American victory boosted the colonists' morale.
Explanation:
In first option A is correct as he retreated when he saw that defeat is inevitable, such in the example of the battle for New York.
B is not correct as he had no money for mercenaries.
C is not correct as he couldn't afford to lose too many soldiers.
D is not correct as American fleet was rather small.
In second options patriots managed to defeat their opponents by surprise, which boosted their morale after the loss in New York.
B is not correct as they didn't had many casualties.
C is not correct as the last major battle was Yorktown.
D is also not correct because as we have said they suffered practically no losses.