Why did congress pass the chinese exclusion act?

a. to reduce the power of the qing dynasty
b. in response to the boxer rebellion
c. to limit trade with china
d. to protect american workers

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”

d.)   when the us left nato after the end of the cold war and they had to evolve to focus on more humanitarian measures with the smaller budget