Environmental Factors and 20th-Century Epidemics
Which environmental factor most directly contributed to the geographic spread of major epidemics during the 20th century?
A
Deforestation for industrial purposes.
B
Urbanization leading to overcrowded living conditions.
C
Innovations in transcontinental railroad systems.
D
The proliferation of agricultural mono-cropping.
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | ijainapally0519 | 2 | 4 | 1m 22s | 98 |
| #2 | hanjoyce242 | 1 | 1 | 0m 08s | 92 |
| #3 | shubhansridhar2010 | 1 | 1 | 0m 09s | 91 |
| #4 | jumphiru7 | 1 | 1 | 0m 15s | 85 |
Items per page:
10
1 – 4 of 4