Answer:
Nazi leader Adolf Hitler violates the Treaty of Versailles and the Locarno Pact by sending German military forces into the Rhineland, a demilitarized zone along the Rhine River in western Germany.
the answer is Air and Water pollution.
7
Explanation:
77
you can't ask that question because of plagerism just WARNING
I believe its choice a because it's the only one that makes sense according to process of elimination
Answer: Has it not started yet?
If it hasn't something is wrong. Or it's too early!