douglasvg wrote:
I also didn't understand why the OA ia letter B.
The issue is not about HOW MUCH it will cost to produce copper from other sources, it is about HOW MANY copper is available. It can be costly, but if it is possible to produce, then it would count as copper available to be used. Therefore, it is strange that the answer is B.
agree with you. bumped into this one again...definitely not a good question for practice.
apollo mission was prohibitively expensive, yet human flew to the moon because "who
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