The answer couldn't be A because criminal suits are usually ordered by the government/law. C and D are pretty much self explanatory.. so that leaves B.
Also, it would be more sensible to file a civil suit and here's why:
Civil suits are usually ordered when a person wants to be compensated (usually in the form of money; so maybe for hospital bills, car insurance payment, and etc.) when they are harmed or property of theirs is harmed (like a car accident or even the situation in this question). And since a criminal suit isnt necessarily "needed" in a situation like this, a civil suit would be the best way to go.
The allied powers used land as their mail gorund to fight on while the germans used the sea as a sneek attack bc the allied powers didn't see it coming that is how the ussr was sank bc of a surpisre attack from the Germans .
