In this XHTML code sample, what will cause an error?

A.
All tags are not in uppercase.
B.
The body tag is missing a background attribute.
C.
The line break tag is incorrectly formatted.
D.
The HTML tags do not read XHTML.
Explanation:
In XHTML, the <br> tag must be properly closed, like this:
.
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LOL….this page uses XHTML
better read the answer in http://www.w3schools.com/tags/tag_br.asp
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In HTML, the tag has no end tag.
In XHTML, the tag must be properly closed, like this: .
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“”
ignore double quotes.
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In XHTML, the tag must be properly closed, like this: .
In HTML, the tag must be properly closed, like this: .
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