Question

10 vasco da gamas discovery of a route to india by sea proved to be a far too costly to be sailed on a regular basis. b very profitable, since da gama returned with a cargo of spices and made a profit of several thou c much longer than the route to india by land. d the only time any portuguese vessel sailed the route, as aborigines later attacked any ship that at

Explanation:

Vasco da Gama's sea - route to India was commercially successful. He returned with a cargo of high - value spices and made a large profit. The route was not too costly for regular sailing as it led to long - term trade expansion. It was not much longer than the land route in terms of its economic viability. And it was not the only time Portuguese vessels sailed it.

Answer:

B. very profitable, since da Gama returned with a cargo of spices and made a profit of several thousand