A. Mulberry Trees
Silk originated from Northern China, silkworms were usually found there in mulberry trees
To prevent atrocities like those experienced by Jewish people in Nazi Germany
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A "rational" use would mean a compromise between different interest and would also take into account scientific knowledge. Therefore neither a complete ban or unconditional permission on lumbering are rational.
A correct answer is
D. National forests should be protected to make the best use of the nation's natural resources.
