Answer:
Correct answer is It gave the Americans additional arsenal.
Step-by-step explanation:
First option is not correct as it didn't provide new recruits in that period. Actually, process of recruitment was very slow during first year of war.
Second option is not correct as Canada was in control of Britain during the war.
Third option is not correct as this was the first great battle during the war in which Arnold participated.
Fourth option is a correct one as they captured a lot of cannons, which they later used during the siege of Boston.