Actually, the answer is B "the development of the hydrogen bomb" :)
The reason why Columbus referred to the people he encountered as Indians was because "<span>B) He thought he landed off the coast of India," since this had been the major goal of his expedition. </span>
I think the reason will be similar with why people want to pay to buy a music from the artists today.
Some people just value the existence of art.
During early greek Era, probably there were not many people who can play music since there were no learning material as its today. So the bards from that era probably blessed with raw musical talent
Steel was not used by the Nubian.
