Given that all users have their home directory in /home and the following directive is present in the Apache HTTPD Server configuration file, what is the full filesystem path to the file referenced by the URL http://server/~joe/index.html?
UserDir public_html
A. /home/joe/public_html/index.html
B. /home/public_html/joe/index.html
C. /home/joe/public_html/htdocs/index.html
D. /home/joe/apache/public_html/index.html