D. All of these responses are true as causes of the split in ideology between the German Jews and Eastern European Jews.
Prior to the 1880s, there was primarily the emigration of German Jews to America prompted by the desire for a better economy. During the 1880s, there was a sporadic increase in the emigration of young eastern European Jews from Russia due to the ongoing pogroms targeted at them. The surging increase in the number of Jewish emigrants from Eastern Europe caused a disaffection amongst their German Jews counterparts who considered themselves socially superior.
While the Eastern European Jews were traditional and basically spoke the Yiddish language, their German brothers worried that they would not easily assimilate the American culture. So, these resulted in class conflicts between the two groups.
Conclusively, all the responses are correct reasons for the cause of conflict between the German Jews and the Eastern European Jews.
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