By the thirteenth century, the political and religious influence of islam traveled further south because of: (select all that apply)
missionaries
disease
crusades
new trade routes

By the thirteenth century, the political and religious influence of Islam traveled further south because of new trade routes into sub-Saharan Africa and through the work of missionaries.

new trade routes

missionaries

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )