which is true of graphite pencils? select all that apply

Question

they are made of a soft, natural material
they are rated according to how dark of a mark they make
the less clay there is in the pencil the darker the mark it makes
the higher number of hardness in a pencil rating the more clay there is in the pencil

Answer 1

They are made of a soft, natural material.
They are rated according to how dark of a mark they make.
The less clay there is in the pencil, the darker the mark it makes