The British army sustained heavy casualties, is the right answer.
Explanation:
The most important battle of the American Revolution was the Battle of Bunker Hill. Though the British won the battle, the continental army under General George Washington successfully captured and fortify Dorchester Heights and push the British to flee Boston and the Harbor. Furthermore, the heavy losses caused on the British during the Clash strengthened the determination of Americans and determined that the relatively unskilled colonists could surely struggle on par with the great redcoats of the British Army.
