You have created a new Comment type, but when you try to add a comment field to a Content type, you can’t select your new Comment type.
What could be the problem’?
A . In your new Comment type, you didn’t select "Content" as the Target entity type
B . Custom comment types can only be added to default Content types
C . "Allow comments" is not checked in the Content type settings
D . You need to clear the site caches to see the new option
Answer: A