Answer the following question given this paragraph: 

The Quaternary Period is the time since the beginning of the ice ages. The climate has been cooler than it was earlier in the Cenozoic. Since the end of the Pleistocene ice ages, which are probably not entirely over, we have been in the Holocene Epoch. The Holocene is also called the Recent.


Q: What is the time since the beginning of the ice ages?

 Choices:

- Paleolithic era

- Mesozoic epocH

- Jurassic period

- quaternary period

A:
quaternary period
