The second answer would have to be correct, because I believe this is focused on the Paleolithic Era.
The answer would be C. Gold. Here's the definition <span> Nubian </span><span>nub </span><span>"gold."</span>
They would feel this because they viewed themselves as the superior race. Using social darwinism to justify their colonization they would go and bear what they called "the white man's burden." They would use improvements in transportation and communication as a reason it was good for the colonized as well. There may have also been feelings of nationalism because of fear of other European nations taking up all the resources and colonies.
Answer: Trade with India
Vasco da Gama was a Portuguese explorer. He is significant for being the first European to reach India by sea. The route da Gama discovered was also the first to link Europe and Asia by sea.
This was a significant discovery as it encouraged the establishment of the Portuguese as an imperial and colonial power in Asia. It also allowed them to trade with India without having to cross the Mediterranean or the dangerous Arabian peninsula.