I think it is A B and C, but I am not completely sure, it might be B, C, and D.
Expensive people living in American
Technology, innovation, and industrialization increased the ideology of conflict, as can be seen when one compares the Thirty Years War, the Thirty Years World War, and the thirty years of conflict that was World War I and World War II. So the answer would be letter a.
C should be the correct answer
