The greatest thing that the nation had to do was get through the Great Depression. The Depression was the thing that was hurting everyone.
The end of the 19 century, American Imperialism kept growing up, they wanted more land, more resources, but they couldn't deal with the Great Powers in Europe, so they invasion Spain.
The answer is D idk why it is it just is
Answer:
Maths achievements:
Basis of Geometry
Algebra
Science and inventions/Technology:
Tha water mill
The odometer
The alrma clock
Cartography
The Olympics Games in the sports field
Earliest practice of medicine
Modern philosophy
Explanation:
The most important areas in which Greeks standed out were math and science. They achieved all kinds of descoveries in the areas of psychology, astronomy, geometry, biology, physics, and medicine.
Some mathematicians, such as Pythagoras and Euclid's researches are still used in mathematical teaching today. They developed relevant basics rules of geometry, including the idea of a formal mathematical proof, and discoveries in number theory, mathematical analysis, and applied mathematics.