One of the Reasons the Portuguese Were the Frontrunners in Western

One of the reasons the Portuguese were the frontrunners in western Atlantic trade expansion was

A) theirs was a wealthy nation and therefore could financially support navigators.
B) their geographical location gave them the advantage of position.
C) Portugal was a nation involved in constant wars so they were looking for peaceful trading partners.
D) their constant involvement with the Muslims showed them that long distance trade could be lucrative.