What of the following can be the best title for the passage

A．Fire and metals are both very important.
B．The science of preparing metal for use began before the use of fire.
C．Tools, weapon and decorations can only be made from metals.
D．Fire has been playing an very important part in their life and work since human beings mastered its use.

A．By any planned purpose.
B．By chance.
C．With fire.
D．On the part of those who were concerned about it.