Which of the follwoing accurately describes a difference between islamic caliphates during the Islamic Golden Age and Western European kingdoms following the fall of the Roman Empire?

D. Science and technology flourished in Islamic caliphates nut declined in Western Europe

What is true and acknowledges the difference between the islamic caliphates during the Islamic Golden Age compared to the different kingdoms of Europe indeed is that there was a flourishment of science and technology all around the islamic cities while both of these were in a decline during these times in Europe. So D is indeed true.