Stage crew lol idk if thats what you mean.
C. He wanted to start an armed slave revolt to help abolition causes
Answer:
The Third Reich was for the German Empire.
Hope this Helped. It was about Hitler.
the Union side lost they had the most numbers in men but their set up was poor which gave the Confederate an upper had.
The correct answer is C) Surgeons began replacing worn-out heart valves with artificial ones.
The medical advancement that occurred during the 1950s is "Surgeons began replacing worn-out heart valves with artificial ones."
During the 1950s, medical researchers discovered new methods to help people with heart diseases. Some great examples are the pacemaker, better techniques for open-heart surgery, and the invention of the artificial heart. These technological advancements represented the opportunity for patients to live a longer life or a quality life.