In which of the following periods of the mesozoic era did forests begin to look like modern day forests and included a variety of conifers and deciduous trees?

a.) triassic
b.) jurassic
c.) cambrian
d.) cretaceous

(not sure what subject to put it under because it's just 'earth science')

In the Cretaceous period, Mesozoic Era forests begin to look like modern day forests and included a variety of conifers and decidous trees.

Explanation:

The Cretaceous period was the last and longest segment of the Mesozoic Era.It lasted approximated 79 million years from the  minor extinction events that closed the Jurassic Period about 145.5 million years ago to the Cretaceous - Palogene ( K-Pg) extinction event dated at 65.5 million years ago. This era have seen more dinosaurs than before.The horned Cretaceous dinosaurs appeared, like the Triceratops and Centrosaurus. The armored Ankylosaurus, duckbilled Parasaurolophus, and large carnivore Tyrannosaurus were a few of the quickly evolving dinosaurs.

The answer is D. Cretaceous Hope this helps!