variables in email confirmations

I'm creating a Code of Conduct course that has a confirmation statement at the end where the user reads and selects 'I Agree' or 'I Do Not Agree'. When they select their choice an email is sent with their answer. Right now, both options (agree and do not agree) is listed with a variablevalue set to 'on' for their selection and null for the other choice. In the example listed, user selected 'I Agree'. I've had a request to remove the value they did not select, in the example below, the 'I do not agree'. How can I accomplish this?

Subject: IES Code of Conduct Completion Form Submit

COBC Confirmation Statement

READ ENTIRE STATEMENT AND MAKE YOUR SELECTION BELOW. I have reviewed a copy of the Legal Compliance and Corporate Policies of Integrated Electrical Services, Inc. and have had an opportunity to ask questions and hereby certify that I understand its provisions. I agree to comply with the Company’s policies and guidelines and to follow all laws relating to the performance of my duties. I understand that the guidelines contained in the Legal Compliance and Corporate Policies do not cover all of the situations which may arise in my work. In the event of doubt regarding the legality or appropriateness of any proposed action, I will seek the advice of the Law Department prior to taking the action. I also understand that in situations where my personal liability is involved I am free to consult with my own attorney at my own cost. By noting below, I hereby certify that I am in full compliance with this policy and that I am not aware of any violations of the Legal Compliance and Corporate Policies manual by any director, officer or employee which I have not reported to management through proper channels. I understand that any violations of this policy can also be reported through the Ethics Line at 1-800-347-9550.

I Agree

on

I Do Not Agree