estimated that ___50% to ___90% of Caribbean Islanders/Native Americans/Amerindians died due to diseases brought by the arrival of Europeans.

We can't be sure of how many natives died as a result of European arrival but it was definitely more than and some estimates place it as high as

50% and 90%

Explanation:

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q1: artillery

q2: simon bolivar

q3:   their workers and farmers demanded a return to spanish rule.

q4: drafted new constitutions

q5: oligarchies have replaced monarchies

answer; archaeologists;