Answer:
(B) Underground Irrigation Canals
Explanation:
<span>The eastern neighbors had been converted to Christianity with the reign of the Byzantine Empire. Cyrillic alphabets were introduced and developed in the regions. Scientific knowledge were also transferred to the eastern neighbors during the Middle Ages.</span>
In the 189os, calls for limiting immigration were largely the result of "(1) nativist reactions toward southern and eastern <span>Europeans" although this was not always true. </span>
Martin Van Buren
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