D. It seems like the most reasonable answer. And there were also trading routes established during those times.
First, take the year that is most recent which in our case is 1973 and then subtract from that 1961 to get 12 years old. Hope this helps!
The correct answer for the question that is being presented above is this one: "Thomas Edison." Thomas Edison improved the incandescent light bulb and he made it possible to quit using oil lamps as a source of light, which sometimes unsafe.
Tyranny is when a nation is ruled by a cruel and oppressive government like when Hitler was the dictator of Germany, Democracy is what the US has, its <span>a system of government by the whole population or all the eligible members of a state, typically through elected representatives, like when we get to vote for president and stuff.</span>
Few natural resources please mark Brainly