The failure of the narrator to consider the fact that radium may affect the outcome of the trial is an example

answer; i believe its called ; checks   and balances;

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.

answer; nearly half;