A plain is a landform that is almost always flat. It is like a small valley.
It would be "Samuel Slater" that has the least in common with the others, since the others all stood for the expansion of the United States through imperialist policies such as Manifest Destiny.
Umm this is the strange question i have seen lol but the best i can tell is A
The telegraph has become the epitome of an obsolete technology. The last telegram was sent two years ago, and Morse code blinked out a few years before that. But in terms of influence, Samuel Finley Breese Morse—born on this day, April 27, in 1791—is anything but obsolete.
<span>Massive inflation caused by the end of any link between the dollar and gold</span>