Profile - Change Security Questions
Security questions are used to verify your identity in order to reset your password. You can add new answers or select new security questions on the Change Security Questions page.

Select Change Security Questions from the user dropdown menu.

You can select the Edit button to change the answer to an existing question.
You can change the entire security question by selecting a new option from the dropdown menu. When a new security question is selected, you must enter a new answer.
You must select three security questions for your account.