B. and C those where some reason why segregation was a thing
In 1949, President Harry S. Truman<span> was the first to deliver his inaugural address to a televised audience; Kennedy would be the first to do so on color television in 1961. In 1997, </span>Bill Clinton's<span> second inauguration was the first to be streamed live over the Internet.</span>
D. It seems like the most reasonable answer. And there were also trading routes established during those times.