Q: where do you change answers to security questions?

From a Kappy  post

The Three Best Alternatives for Security Questions and Rescue Mail

   1. Use Apple's Express Lane.

          Go to https://expresslane.apple.com ; click 'See all products and services' at the

          bottom of the page. In the next page click 'More Products and Services, then

          'Apple ID'. In the next page select 'Other Apple ID Topics' then 'Forgotten Apple

          ID security questions' and click 'Continue'. Please be patient waiting for the return

          phone call. It will come in time depending on how heavily the servers are being hit.

     2.  Call Apple Support in your country: Customer Service: Contacting Apple for support or

          Apple ID- Contacting Apple for help with Apple ID account security. Ask to speak to

          Account Security.

     3.  Rescue email address and how to reset Apple ID security questions.

How to Manage your Apple ID: Manage My Apple ID