The correct option is
C A polymer made out of one kind of monomer units.
A homopolymer is a polymer made up of only one type of monomeric unit.
For example, polyethene is a homopolymer having ethene as the monomer. In this case, ethene molecules join together to form a repeating unit, which inturn forms the polymeric structure of polyethene as shown below.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/409980/original_227007.png)