Complete the sentence about Chuquicamata with the correct year: For most of the 20th century Chuquicamata was the most productive copper mine in Chile until this position was overtaken by Escondida in ______.

Answer and explanation

Correct answer: D. 1996

For most of the 20th century Chuquicamata was Chile's most productive copper mine, until Escondida overtook it in 1996. It remains huge.

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