What Convinced Europeans That the Torrid Zone Did Not Exist

What convinced Europeans that the torrid zone did not exist?

A) Venetian sailors, who had sailed to Arabia, had no experience with the zone.
B) European geographers, who had read Arabic sources, did not believe in the zone.
C) Columbus's voyages did not encounter torrid or frigid zones.
D) The Portuguese, who sailed past Cape Bojador in 1434, forced many to reconsider the existence of the zone.
E) Henry the Navigator's excursions into Morocco proved the zone did not exist.