Scientists divide time into four main sections. two sections are the precambrian and the paleozoic. what are the other two sections?

a.
triassic and cenozoic

b.
pennsylvanian and mesozoic

c.
ice age and precambrian

d.
cenozoic and mesozoic

I think the answer D- the Cenozoic and Mesozoic

the answer is the

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume