Divided :

The correct answer is C. Separated.

To divide something is to break it into parts or groups. Something that is divided is not whole or complete. It can also mean to cause people or groups to disagree or become hostile towards each other.

A. United means joined together as one. Something that is united is whole and complete. It can also mean to cause people or groups to agree or become friendly towards each other.

B. Dignified means having or showing a sense of one’s own worth and importance. Something that is dignified is respectable and impressive.

D. Isolated means cut off from other people or places. Something that is isolated is alone and lonely.