according to scientists , what factors play a role in global warming ?

A . climate cycles .

B . over fishing .

C . solar variability .

D . higher-than-normal concentrations of carbon dioxide .

A, C, and D.

Explanation: All of these answers except B strike me as factors. Please tell me if I am wrong! :)

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; quantitative versus qualitative research;