All the following empires collapsed by 550 C. E. EXCEPT Text to speech A:A. the Han Empire.
B:B. the Gupta Empire.
C:C. the Roman Empire.
D:D. the Sassinian Empire.

C. The Roman Empire which didn't even exist for another 520-ish years.

Explanation:

to act quickly in times of danger to the united states

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

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.