Answer:
B. Carrying trace in spices.
Explanation:
By the time we, the Portuguese, got to India by sea, after Vasco da Gama found the way around the Cape of Good Hope, no one had reached America yet. That rules out option A.
Plus, we had nothing to gain from military coercion, as it is widely known that the Portuguese made a lot of money selling spices in Europe in the early days of the discovery age.
Most logical option would be B.