You are an IIS Web server administrator implementing authentication settings for a new Web site.According to the requirements for the Human Resources Web site， users should be prompted forauthentication information when they attempt to access the site. The site will be accessed only by userswho have accounts in your organization’s Active Directory domain. You have already configured the filesystem permissions for the content based on the appropriate settings. You also want to maximize securityof the site. Which two actions should you take to meet these requirements？（）

A. Enable Windows authentication.
B. Enable basic authentication.
C. Disable anonymous authentication.
D. Enable anonymous authentication.