Unrestricted submarine warfare is the practice of using submarines to attack and sink all forms of enemy shipping, whether they are military or civilian. It is most closely associated with the First World War when Germany's decision to use USW brought the US into the war and led to their defeat.
Answer:
how am I suppose to know what your not talking about when you didn't even put a image in image of what ?
My guess would be b but im not to sure hope this helped
you see if the mango is fully done
Check google, they have a lot
