The Portuguese Were Able to Break the Arab Monopoly of Trade

The Portuguese were able to break the Arab monopoly of trade in the Indian Ocean by

A) designing ships that were faster and more maneuverable than those of the Arabs.
B) allying with Spain against the Arabs.
C) fighting battles at sea with effective fire power.
D) both designing ships that were faster and more maneuverable than those of the Arabs and fighting battles at sea with effective fire power.
E) All these answers are correct.