Comment author must fill out name and e-mail
Check this box as a way to force spammers to do a bit of extra work. In reality, the name and e-mail address are not verified in any way prior to the comment being submitted. Most legitimate commenters are more than willing to fill out a name and e-mail address. However this option overwritten by wpDiscuz similar options, please see screenshot below:
Users must be registered and logged in to comment
If this checkbox is checked, only logged in registered users will be able to write comments on your site.
Automatically close comments on articles older than [X] days
Check the box and enter the number of days (e.g. 14 days) after which WordPress will automatically flag eligible posts so that no more comments are accepted.
Enable threaded (nested) comments [X] levels deep
Check this box to enable threaded comments, then from the drop-down box, select the number of levels deep (maximum of 10 levels) you will allow for nested comments. Note that themes need to be specially coded to properly display threaded comments.
Break comments into pages with [X] top level comments per page the [last/first] page displayed by default.
Check this box to cause comments to display in a paginated format with the specified number of comments per page. This will show the default ..[>] comment pagination buttons. I you want to change those to wpDiscuz AJAX [Load More Comments] button you should keep this option unchecked.
Comments should be displayed with the [older/newer] comments at the top of each page
Whether the oldest, or newest, comment is to be displayed first. By default WordPress comes with “oldest” option so you’ll see wpDiscuz sorting buttons like this: