The decline of agricultural economies
The correct answer is letter C
Explanation: Terrestrial planets are those formed mainly by rocks and metals, have a solid surface without the incidence of rings, as is the case with Mercury, Venus, Earth and Mars. Mercury is the smallest planet in the solar system, its core consists of dense metal, especially iron.
Answer:B and C
Explanation: A: Slavery was abolished after the Civil War. D is untrue.
