I need a explanation as well! Which sentence best summarizes the following excerpt from the Chinese Exclusion Act, which Congress passed in 1882?

Whereas in the opinion of the Government of the United States the coming of Chinese laborers to this country endangers the good order of certain localities within the territory thereof: Therefore,

Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That from and after the expiration of ninety days next after the passage of this act, and until the expiration of ten years next after the passage of this act, the coming of Chinese laborers to the United States be, and the same is hereby, suspended; and during such suspension it shall not be lawful for any Chinese laborer to come, or having so come after the expiration of said ninety days to remain within the United States.

SEC. 2. That the master of any vessel who shall knowingly bring within the United States on such vessel, and land or permit to be landed, any Chinese laborer, from any foreign port or place, shall be deemed guilty of a misdemeanor, and on conviction thereof shall be punished by a fine of not more than five hundred dollars for each and every such Chinese laborer so brought, and maybe also imprisoned for a term not exceeding one year.

A.
The Chinese Exclusion Act of 1882 banned Americans from hiring Chinese laborers.
B.
The Chinese Exclusion Act of 1882 was passed to maintain law and order in the United States.
C.
The Chinese Exclusion Act of 1882 prohibited Chinese laborers from entering the United States.
D.
The Chinese Exclusion Act of 1882 required all Chinese workers in the United States to leave the country.