Which of the following was a farming technique used by Aztecs?

A.
They grew all of their crops inside greenhouses.
B.
They used the three-field system of crop rotation.
C.
They used oxen to plow their fields.
D.
They grew crops on small plots of land surrounded by water.

to act quickly in times of danger to the united states

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

angel island immigration station was an immigration station located in san francisco bay which worked from 1910 to 1940. the majority of immigrants that got there were from the asian hemisphere, specifically from china, japan, russia, and south asia, being china the country from where more people arrived.

the number of foreigners arriving at it took the attention of americans who feared the new arrivals would take their jobs. the work opportunities were not abundant due to the economic comedown of 1870 and the asians, as newcomers, were willing to work for cheaper wages. soon they started to be seen as a threat, which led to an increased discrimination against the chinese - the biggest ethnicity arrived at this station until 1915 when japanese immigrants outnumbered them - being considered as unsuitable americans hence their looks and social situation.

at the station, the immigrant's detention may vary depending on how long the interrogation process took: it could be weeks, months, or even years.

finally, in 1940 an explosion destroyed administration building located on the island, so the united states government decided to stop the process.

with the political divide on multiple issues we are headed that way but one of the biggest issues that has texas involved is that democrats believe that only and form of officer or military member can posses a firearm and if they ever end up repealing the right to bear arms i am sure that most people in the lower southern states would choose to seceed in order to keep thier firearms and even fight for them. this is my opinion it does in no way, shape, form, or fashion represent everyone in the lower southern states nor am i implying thst only the southern states want to keep there firearms.