Why did the spread of islam to swahili coast to increase trade there?

a.) islam unified the cities of the coast and connected them more closely to other muslim traders.
b.) the influence of islam caused the swahili people to learn arabic as a common language.
c.) because mohammed was the merchant muslims have always revered encouraged trade.
d.) islam discouraged the consumption of alcohol, which reduced crime in the ports.

The correct answer is: A.) Islam unified the cities of the coast and connected them more closely to other Muslim traders.

Islam gave a common language, religion, and culture which bonded trading cities together.

Hello

Islam unified the cities of the coast and connected them more closely to other Muslim traders.

Hence the correct option is

option A✔✔

Thanks

your mothers brothers brother in law would be your father.

they spoke the dravidian language. hope this , correct me if im wrong