Which of the following does NOT determine whether a rock is an ore?

A) the grade of the ore
B) the type of ore, such as oxide versus sulfide types
C) size and depth of the mineral deposit
D) the location of the deposit
E) all of these factors determine whether a rock is an ore

Ore

A rock, sediment, or other material that can be mined for a profit.

Mineral Deposit

Concentrated accumulations of minerals from which economically valuable materials can be extracted.

Oxide

1. Any member of a group of minerals that consist of oxygen bonded with a metallic element, like iron. 2. Mineralized rock that contains minerals, especially those of iron and copper, that formed near the surface or in other oxidizing conditions.