Here is the client request. Please instruct me how to achieve this.
1. The survey will consist of 260 multiple choice questions divided into about 11 sections.
2. Create a Table of Contents that outlines the various sections of the survey.
3. The respondent should be able to go to the table of contents and choose which section of the survey they want to work on. The survey should be completable in non-consecutive order.
4. Respondents should go back to the table of contents after completion of each section. Now, the answered section should be inactive or hidden. Respondent should be able to select only the unanswered section.