Question

Copper, gold and tin were among the first metals to be used by human societies. The use of iron occurred  much later, even though iron is much more abundant in earth's crust than copper, gold or tin. The most  likely reason for this is the fact, compared with copper, gold, and tin,

A. iron is harder.

B. iron is less shiny, and was therefore less attractive.

C. iron, because its density, is only found in deep Earth Crust.

D. Iron is more reactive, and so is more difficult to obtain from its ores.​

Answer 1

Answer:

a) Iron is harder

I hope it's helpful!:)

Answer 2

Answer:

answer is D option Iron is more.....