You are presented with this XML file:
<?xml version="1.0" encoding='UTF-8' ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" 'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd'> <body> <employee> Éloïse <phone no="12345643"></phone> <phone no='12345643'/> </employee> </body>
What's wrong with this file? (choose all that apply)
A: It's not well formed.
B: It's not valid.
C: It's using a doctype: that's only for HTML not XML.
D: The strange characters in "Éloïse" should have been escaped.
E: Double and single qoutes are mixed in the same file.