Answer:
The Great Depression was a severe worldwide economic depression that took place mostly during the 1930s, beginning in the United States. The timing of the Great Depression varied across the world; in most countries, it started in 1929 and lasted until the late 1930s.
Explanation:
If you meant Denton Cooley, he was the first person to implant an artificial heart in 1969.
The answer is A my friend.
C) in an attempt to improve on them
Or
B) because of their great beauty
C countries cannot produce all they need on their owm
