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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answer; the confederacy could afford to move a large number of prisoners hundreds of miles but could not afford to fee and house the prisoners;

in an absolute  monarchy, the  monarchrules as an autocrat, with absolutepower  over the state and government — for example, the right to rule by decree, promulgate laws, and impose punishments. the  monarch isnominally sovereign but the electorate, through their legislature, exercise political sovereignty.