The regions with the highest and lowest densities are respectively ________
A. Europe and Africa
B. Asia and Oceania
C. North America and Africa
D. Europe and Oceania
Answer: Option D
A. Europe and Africa
B. Asia and Oceania
C. North America and Africa
D. Europe and Oceania
Answer: Option D
The years 1700, 1800 and 1900 were
A. Leap years
B. Not leap years
C. Famine years
D. Years of natural calamities
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