What was the key reason for the ending of the native civilizations of America? (A)Slave labor worked them to death.
(B)Neighboring tribes revolted at their immense power.
(C)desire to control the precious mineral wealth
(D)refusal to convert to Catholicism

ME

Explanation:

Answer slave labor worked them to death

Explanation:

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.

the answer is b: an economic crisis throughout the country.