The observed change in the reserves of copper, lead, and zinc between 1960 and 1990 was most likely caused by
A)low prices discouraging exploration for new reserves.
B)a slowdown in demand growth.
C)high prices that stimulated exploration.
D)the discovery of substitutes.

Question

Quizplus · Accepted Answer

The high prices of copper, lead, and zinc during this period stimulated exploration for new reserves, leading to an increase in reserves.

The Observed Change in the Reserves of Copper, Lead, and Zinc