Figure 39.21a -At Which Elevations Were Most Frog Extinctions Occurring According to Occurring
figure 39.21a 
-At which elevations were most frog extinctions occurring according to figure 39.21a?
A) 0-199 m
B) 200-1000 m
C) 2,400-4,000 m
D) 1,001-2,399 m
E) They were equally distributed at all elevations.
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