What is ALWAYS a property of an ore?
A. It is renewable.
B. It is black in color
.C. It is cost-effective to extract.
D. It is found in the Earth's mantle.

Respuesta :

C. It is cost-effective to extract
Question :
What is ALWAYS a property of an ore?

Answer :
C. It is cost-effective to extract.

I hope it helps and please press brain
(^_-) Rie