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:
5th century BCE ancient period
Answer:
Because ancient China was responsible for a rich culture, that is still evident in modern China
Explanation:
The answer is probably c or d
According to Arab oral tradition, Islam first came to Africa with Muslim refugees fleeing persecution in the Arab peninsula
