A person who opened the survey in IE11 and is trying to complete it says that he is unable to click the radio buttons to make selections. We are using IE11 in our test environment and it works fine. What is the difference?
When he opens the survey in Google Chrome, it works.
The issue you are describing is likely a result of the person accessing the survey in a high-security environment. In this case, the following document should help you resolve the problem:
I hope this helps!