What was the most important event/method that influenced the spread of Islam throughout the world? Please be sure to identify a specific example of an event or method and to fully explain you reasoning.

Where are the following

Born in braintree (present-day quincy),  massachusetts, on october 30, 1735, john adams was the oldest of john and susanna boylston adams’ three sons. the elder adams was a farmer and shoemaker who also served as a congregationalist deacon and an official in local government

Ithink the correct answer is d ! good luck