An important effect of Islamic expansion in the 700s CE on the civilization of Europe in the Middle Ages was that it

Responses
A caused Vienna to fall to Arab control.
caused Vienna to fall to Arab control.
B changed artistic styles of western Europe.changed artistic styles of western Europe.
C caused massive reforms in the Christian Church.caused massive reforms in the Christian Church.
D helped to keep alive knowledge from classical civilizations.

D helped to keep alive knowledge from classical civilizations.