How did Washington gain control of Boston?

Question

a.He gained the trust of Native Americans who led a deadly attack on the British.
b.He sent 16,000 troops to launch a surprise attack on the British fort protecting Boston.
c.He strategically placed cannons overlooking the harbor which forced out the British.
d.He surrounded the harbor, giving them no option other than to surrender.

Answer 1

c. He strategically placed cannons overlooking the harbor which forced out the British.