Please help do no waste answers In which case would a researcher need to submit his idea to the university’s IRB

A: if the study involves use of animal subjects
B: if the researcher is not a tenured professor at the IRBS university
C: if the study involves the use of human subjects
D: if the researchers results didn’t come out as he was anticipating

everyone knows that religion has a dangerous tendency to promote violence. this story is part of the conventional wisdom of western societies, and it underlies many of our institutions and policies, from limits on the public role of religion to efforts to promote democracy in the middle east.

explanation:

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

answer; with few regulations protected the prices of crops which made farmers leave their farms and migrate to the big cities to work in factories;