The Enormous Legacy of Muslim Learning for European Commerce,literature,and Science

The enormous legacy of Muslim learning for European commerce,literature,and science is most clearly seen in the:

A) adoption of Islam by many people in western Europe during the Middle Ages.
B) unwillingness of European monarchs to conquer Muslim-controlled territory in Europe.
C) presence of prayers for Muslims in most prayer books produced in medieval Europe.
D) introduction of a large number of Arabic and Persian words into European languages.
E) presence of Muslim schools and teachers all over Europe in the Middle Ages.