the 1970s, the island of Nauru had one of the highest per capita incomes in the Oceania region due to extensive _______ mining.

Agold
Bphosphate
Ccopper
Dnickel

Verified Answer :

In the 1970s, the island of Nauru had one of the highest per capita incomes in the Oceania region due to extensive phosphate mining.

The 1970's, the island of Nauru had one of the highest per capita incomes in the Oceania region due to extensive PHOSPHATE mining.