Answer:
monarchy, aristocracy, and democracy
this is correct.
Unless you have some classified the answer is no. United Stated and Russia are not in an official Cyber War, although I would not be surprised if we would soon find out they are going at one another through those means.
Answer:
D
Explanation:
Supermassive black holes are in the center of galaxies. They have an enormous mass, and are not that easy to detect.
They exert a very strong gravitational pull.