Your company has an internal Web application that uses a self-signed SSL certificate.  The company has an internal certification authority （CA） with autoenrollment.When users attempt to start the Web application， Internet Explorer displays an error message that recommends closing the Web page rather than continuing to the application.    You need to ensure that Internet Explorer does not display the error message.   What should you do？（）

• A、Issue a certificate from the internal CA and install it on the application server
• B、Install the Web application’s certificate into the computer store on each client computer
• C、Install the Web application’s certificate into the personal store on each client computer. Add the application’s URL to the Trusted Sites zone in Internet Explorer
• D、Purchase a commercial certificate and install it on the internal CA