The battle of saratoga did not allow the british to a. keep the french from joining the war. b. cut off new england from the rest of the colonies. c. march on new york city. d. begin their southern strategy.

the correct option is A
A. keep the French from joining the war
 
The victory boosted the morale of the patriotic soldiers but most importantly, it was very costly to the British and forced a surrender of a record number of  herb soldiers. It also captivated the french government to support the colonist because it assured them that America could win the war.