How did muhammad of mecca come to successfully spread his new religion islam across these arabian peninsula

Well, I already know this since I am Muslim and in the religion he is in Islam. Here's your answer.

He sent messages to people to tell them about Islam and shared the message to people.

The answer is C: "It helped to unify much of the Arabian peninsula under Islam"

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44