The greatest number of Mexican immigrants came to the United States during the 1970s. 1980s. 1990s. 2000s.

1970s

Explanation:

During the 1970s, almost five million immigrants arrived in the United States the largest migration of people since the 1920s. The great majority of these five million immigrants came from Asia, the Caribbean, and Central America; in the 1970s, Mexico had more immigrants as compared to any other nation. Hence the correct option will be 1970.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

i'm pretty sure the answer would be

c. england

hope this best of luck sorry if i'm wrong

~animaljamissofab ♥