Question

1. for a mineral to be considered an ore, which requirement must it meet? a. it must be a common mineral. b. its production must not generate pollution. c. it must be naturally occurring. d. its production must generate a profit.

Explanation:

An ore is a mineral or rock from which a valuable substance (usually a metal) can be profitably mined. Profit - generation from production is a key requirement. A mineral doesn't have to be common to be an ore. Production of ores often generates some pollution and being naturally - occurring is a characteristic of minerals in general, not the defining factor for an ore.

Answer:

D. Its production must generate a profit.