Which major event most contributed to the spread of islam

How Muhammed's army had defeated all the other tribes during that time was very astonishing to the other tribes since the other armies were almost 10times the armyman as muhammed's which only had about 319 at the time. Other tribes decided to help Muhammed so their tribes would not perish. One by one, they started to believe in Islam umtil every single tribe in the middle east believed in Islam.

Please mark my answer as brainliest as i have spent alot of time on this.

Thank you!

Muhammad conquered Mecca. Short for what that guy said

the answer is b. hope this !

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.