Unrestricted submarine warfare, which became prominent in World War I, meant that submarines could sink any time of vessel at any time without warning. Before this, they had to surface first and place crews on lifeboats.
Give me 5 min ill come back with the answer
Because he said that he wasn't fit to be president and never should have been
B. Living in ethnic enclaves. This can be compared to modern times.
Literature aided it by spreading the word of slavery and why it should come to an end. people began reading what was wrote about slavery that began the movement
