[Plugin: SurveyMe] Unknown Option

This is a type that should have been disabled for the survey plugin. It applies to its sister plugin which is a contact form and sends out email.
Just like in email, it stands for carbon copy.
It allows the person submitting the for to receive a copy.

Please make sure that you are using version 1.7.1 of the plugin. Currently all versions have been removed as there is problems on some systems with the settings, causing problems like this.

Regards
D