The sharp drop in the silver market that affected the Bolivia's income occurred in the Year 1980s..
What caused the drop in the mining industry?
The country's mining business was declined as a result of destruction, flooding and abandonment of mines.
Also, the lack of investment and insufficiency of labor contributed to a point that was dropped by silver production in the country.
However, sharp drop in the silver market that affected the Bolivia's income occurred in the Year 1980s.
Therefore, the Option A is correct.
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