As Islam spread from the seventh to the twelfth centuries, Muslim culture tended to-

A. discourage international trade.
B. blend elements of local cultures.
C. persecute mathematical scholars.
D. prohibit traditions of local cultures.

Correct answer is B. blend elements of local cultures.

Explanation:

Option A is not correct as international trade between the continents of the Old World was pretty much developed. And the Muslim empires developed this.

Option B is correct as they wanted to adopt the previous cultures to their religious beliefs.

Option C is not correct as science, especially math was developing on this period.

Option D is also correct because local cultures were not prohibited. Everyone had opportunity to present his own beliefs.

just finished this it is b. centrifugal force