The battle of bunker hill in 1775 was considered a victory for the continental army because the americans maintained their control of bunker hill. the british army sustained heavy casualties. the americans forced british soldiers to retreat to boston. the british army was forced to use most of its ammunition.

I'm not sure if this is right but I will give you my answer that I know:

On June 16, 1775, having learned that the British were planning to send troops from Boston to occupy the hills surrounding the city, some 1,000 colonial militiamen under Colonel William Prescott (1726-95) built earthen fortifications on top of Breed’s Hill, overlooking Boston and located on the Charlestown Peninsula. (The men originally had been ordered to construct their fortifications atop Bunker Hill but instead chose the smaller Breed’s Hill, closer to Boston.)

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answer; (d) i believe that the correct answer is americans finally ran out of ammunition;