Linguists believe that
A. nothing can be done to preserve linguistic diversity.
B. the number of languages spoken in the world is increasing rapidly.
C. only 120 languages are now spoken in the world.
D. the world's linguistic diversity has been cut in half over the past 500 years.
E. all people should study English in order to facilitate cross-cultural communication.
Answer: D
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Intensive agriculture has the benefit of increasing ecological diversity.
Answer the following statement true (T) or false (F)
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