Question

which metal is mined in arizona and has been an important part of the states economy for more than 100 years?
copper
gold
iron
silver

Explanation:

Arizona has a long - standing history of copper mining. Copper mining has been a significant economic activity in the state for over 100 years. Gold, iron, and silver mining have not had the same level of long - term economic importance in Arizona as copper mining.

Answer:

copper