12. Within the Islamic Empire, the Turkic people

A. were completely integrated into the Arabic world.
B. were mainly concerned with trade and commerce.
C. acted as a powerful military shield.
D. were educated people who administered the realm.

c seems correct -- can someone check

C. is not correct.

ok then it must be (a) the way they word everything makes it confusing

I don't think that's the answer, either. What does your book say?

This site will also help you.

http://en.wikipedia.org/wiki/Turkic_peoples#Islamic_empires

no one know how it happend, but the islamic world transformed most of the turkic invaders intom its strenght and shiled. The newley converted turks conqured anatolia an Armenia from christians.

Please proofread your statement above. I don't understand it because of so many misspelled words.

no one knows how it happend, but the islamic world transformed most of the turkic invaders into its strength and shield. The newley converted turks conqured anatolia an Armenia from christians.

That makes it sound as though C. is correct.