If you're confused, especially after looking at the application for a mail-in ballot, you're not alone. Fortunately, GPTX has you thoroughly covered.
The instructions above the checkboxes for questions 6a and 6b provide all you really need to know. Unless you are apply to vote by mail specifically in a primary election, check just one box:
Blogging Sporadically since 2014
Here you will find political campaign-related entries, as well as some about my literature, Houston underground arts, peace & justice, urban cycling, soccer, alt-religion, and other topics.