An example of a material that has been both a resource and a reserve, depending on abundance, economic conditions, and mining technology, is:
A) platinum.
B) gold.
C) petroleum.
D) iron.
E) all of the above

Question

Quizplus · Accepted Answer

All the materials listed - platinum, gold, petroleum, and iron - have been considered both resources and reserves at different times, influenced by their abundance, economic conditions, and advancements in mining or extraction technology.

An Example of a Material That Has Been Both a Resource