Jeremy Has Been Using XML to Organize Data for a Company

Jeremy has been using XML to organize data for a company that manufactures medical devices. He knows you have experience writing XML data to an output file using XSLT and XPath, and asks for your help improving the display of his data.
-Jeremy has been asked to create an output document written in HTML5, but is not sure how to insure the final file will meet this requirement. Which output element do you suggest he use to generate a file that will conform to valid HTML5 standards?

A) <xsl:output language="html5" doctype-system="about:legacy-compat"
Encoding="UTF-8"
Indent="yes" />
B) <xsl:output language="html" doctype-system="about:legacy-compat"
Encoding="UTF-8"
Indent="yes" />
C) <xsl:output method="html" doctype-system="about:legacy-compat"
Encoding="HTML5"
Indent="yes" />
D) <xsl:output method="html" doctype-system="about:legacy-compat"
Encoding="UTF-8"
Indent="yes" />