A. stringent international control
B. marked decrease in world demand
C. the development of synthetic substitutes
D. marked decrease in population of elephants
Correct Answer:
Option C – the development of synthetic substitutes
A. stringent international control
B. marked decrease in world demand
C. the development of synthetic substitutes
D. marked decrease in population of elephants
Correct Answer:
Option C – the development of synthetic substitutes
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