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.

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.