Answer: it would be the renewal of unrestricted submarine warfare from Germany. Otherwise C
Explanation: The Germans continue to become more and more ferocious with their U-boat attacks, their hopes were to cripple the United Kingdom by silently attacking supply ships. Once the Lusitania was sunk the world became aware of the tragedies of unrestricted, moral ignored warfare
That would be "the red scare" hysteria over communist influence. It really put many Americans on edge. Federal employees were questioned and to great lengths to make sure their alliance to the US was strong.
Amasia was on the edge of the Roman empire, and when strabo was born around 64 B.C.
Small, isolated communities