Sorry idk this one hope I can help on the next
iş the uncertainty in situational awareness experienced by participants in military operations. fog war simulates the unknowns of the battlefield
Because they knew that Germans could sink any ship they want. They could sink civilian ships. Back then, the only way to travel long distances was by boat, because passenger airplanes had not been invented. The Germans could now sink them if they wanted to travel somewhere, so they either risk their life or not go on trips.
I don't know fully so I'll narrow it down to two answers.
B and D, I'm sorry for not giving the correct answer