Answer:
I think if there is an option that says all of the above then that is the answer but if not then i don't know
Explanation:
Answer:
The answer should be: Companies replaced hand-operated brakes with air brakes on trains.
Explanation:
You have to think how hard it was for trains to stop with hand operated brakes. Trains go fast, and not stopping in time can be dangerous. Hope this helped :)
Answer;
B) Neither side could win an advantage.
Explanation;
-Korean War was a war fought on the Korean Peninsula from 1950 to 1953 after troops from communist North Korea, armed with Soviet weapons, invaded democratic South Korea, prompting the United States and the United Nations to send forces to support South Korea and fight to unify the Korean Peninsula into one democratic nation, which in turn prompted China to join the war on North Korea's side; at war's end, the peninsula remained divided into two nations
-The war began when North Korean troops armed with Soviet weapons invaded South Korea. Their aim was to unite all of Korea under communist rule. Truman, viewing the invasion as a test of American will, ordered U.S. forces to help South Korea repel the invaders. Truman turned to the United Nations for support. A UN resolution condemned the North Korean invasion and called on member states to aid South Korea.
D)
Rent controls result in shortages and minimum wage laws result in surpluses.
