The ends of the geologic eras such as the paleozoic and mesozoic are marked by
a.
mass extinctions.
b.
index fossils.
c.
radioactive decay.
d.
climate changes.

Brainliestttme : ) what caused the first opium war? chinese confiscation and destruction of british opium chinese support for the boxer rebellion british efforts to increase opium prices british attempts to force china to accept opium as payment

Why might congress have had difficulty paying the war debt after the american revolution

The idea of manifest destiny simply stated it was america's destiny to expand from the atlantic ocean to the pacific. the word "destiny" implies an idea that it was within our rights as a nation to expand. in a paragraph of 125+ words, explain what could be wrong with that idea.