Question

1. Copper mining is expensive.
2. The ore has only a little content of the metal.

Options

• (B) contradicts (А).

• (B) is the reason for (A).

• (A) is true but (B) is false.

• (A) and (B) are independent of each other.

Answer 1

(B) is the reason for (A).

Explanation:

Copper ores often have a relatively low percentage of pure copper, generally less than 1% to 2%. As a result, mining companies must unearth, crush, and treat huge amounts of raw rock to obtain a limited amount of usable copper. This significant material handling, combined with complicated smelting and refining, necessitates enormous energy and expensive machinery, directly increasing the whole extraction cost.