As a result of the immigration act of 1965,
a) new quotas on asian immigration were established.
b) victims of war were not allowed to enter the united states.
c) racial and ethnic restrictions became more important.
d) skilled and educated workers were encouraged to immigrate.

As a result of the Immigration Act of 1965, skilled and educated workers were encouraged to immigrate - D.

the question is asking about the things that may have affected and what they effects had on the spanish conquest and settlement of america

explanation:

here are some major conflicts i found. maybe pick one and do more research on it. (cause i ain't writing 6 paragraphs)

in 1877, the nez perce war took place.

1881 - president james garfield was assassinated.

1882 - the chinese exclusion act was passed.

1883 - a decision in the civil rights cases legalized racial segregation in the united states.

1887 - the dawes act was passed.

1893 - the panic of 1893 took place. (what a creative name)

and there are probably other topics you can find if you just search up "united states timeline," or "conflicts in the 19th century for america."

then once you find a topic you like find out how it affected the people of america and what not. (sorry if this feels a bit short changed, history was and never will be one of my strong topics)