You can automatically eliminate A and B which leaves you with D and C the better choice would be D.
The answer is B.
A isn't entirely simplified.
C does not have the subject.
And D does not capture what was said.
Hope its right!
Answer:
the Crusaders brought back new ideas, technologies, medicine, etc. from the more advanced Muslim civilizations.
Explanation:
Dangerous, cautious , confusion and eximent