Which of the Following Factors Were Not in Your Explanation

Multiple Choice

Which of the following factors were not in your explanation?

A) Technological inventions can increase the efficiency of gold extraction from the ore.
B) New sources of the gold ore are found through better exploration techniques.
C) Technological inventions can increase efficiency of gold processing out of the ore.
D) As supplies decrease and prices rise it is less rewarding to explore for new sources of the gold.
E) All of these factors are based in economics and would be used in my explanation.