Add a "help" option for each question

[shobrook]

No description provided.

[alichtman]

Maybe a built-in description for each is more useful than a help function. Give everyone the information up front instead of having them ask for more info?

Need concise explanations for each setting.

Include rationale, too? Because information about the settings doesn't necessarily explain why they're important. Or throw in a print statement pointing them to the Mac Security Repo?

[alichtman]

Included in merge #9