How did vasco de gama i portugal gain influence in india spice trade
a. by traveling along the silk road
b. by opening sea route to the west
c. by finding the northwest passage
d. by sailing around the southern tip of africa

B.by opening sea route to the west

Explanation:

Vasco de gama helped Portugal gain influence in the Indian spice trade through finding a sea rout from Europe to India.The spices found in India were on high demand in Europe but could not be availed there due to transport constraints in terms of the lack of a rout.Through finding the sea rout to India, then Vasco de gama helped the Portuguese travel back and forth for spice business.