The Battle of Saratoga (1777) was a key victory for the American colonists because it A
convinced the British to offer recognition of colonial sovereignty.
B.
brought the colonists much-needed aid and a formal alliance with France.
C.
prevented the fighting from spreading into the southern colonies.
D.
prevented the colonial capital from being captured by the British.

B. brought the colonists much-needed aid and a formal alliance with France.

Explanation:

The Victory at Saratoga convinced the French to ally and send aid to the Americans. It also provided an opportunity for the French to get revenge at the British, as the French declared war on the British and started shelling cities a few months later.

the answer would be c

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.