How did trade help early Africans develop advanced societies?

A. It introduced them to new religions.

B. It allowed them to make weapons out of iron.

C. It made the gold they mined less valuable.

D. It allowed them to trade natural resources for items they needed.

*Help will be greatly appreciated*

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.