The XML document below has been parsed into $xml via SimpleXML. How can the value of <foo> tag accessed?
<code>
<?xmlversion=’1.0′?>
<document>
<bar>
<foo>Value</foo>
</bar>
</document>
</code>

A.
$xml->bar[‘foo’]

B.
$xml->bar->foo

C.
$xml[‘document’][‘bar’][‘foo’]

D.
$xml->document->bar->foo

E.
$xml->getElementByName(‘foo’);