Which one of the following times would be the longest?

Question

A. Jurassic period
B. Carboniferous period

C. Paleozoic era

D. Mesozoic era

I think C is the right answer, am I correct?

Answer 1

Paleozoic era lasted about 230 million years.
Mesozoic era about 180 million years.
The rest a reubdivisions of an era so they definately lasted for a much shorter time.

Answer 2

Well C is correct .Paleozoic era is longest .but you are comparing jurassic period which is a period in mesozoic era.and Carboniferous period is itself in Paleozoic era.
but among the 4 eras Paleozoic era is longest and among periods Ediacaran is longest