China has considerable rare-earth metal reserves. Which situation is a problem for the U.S.?
A. They are stockpiling these reserves and reducing exports to meet their own needs.
B. Since they are a critical component in a nuclear warhead, this situation could tip the nuclear balance in their favor.
C. The mining and processing is causing pollution on a worldwide scale.
D. China artificially depressed the price of these metals causing other producers to stop mining.
Answer: A
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