How do the events depicted in “mansa musa i: the richest man who ever lived” interact with one another?

Mansa Musa I lived in the fourteenth century in Mali Kingdom.

Being a devoted Muslim, he traveled to Mecca, the action here is probable , the devotion to his religion creates the effect of his movement to Mecca.While on his way to Mecca he stopped in Egypt , reaching in Egypt is a dependent variable . It depends on the fact that he lived in Kingdom of Mali and him being a devoted religious man.Decision made by Musa I to move to Mecca leads him to Egypt  While in Egypt , he made a name for himself and becomes prominent individual known world wide .The events in his life connects to each other whereby the first one leads to another and then the next one simultaneously  

Not b or c so that leaves you with a or d. a is the better choice.

Idk you definitely don’t give me 15 points it say 8.