Briefing Zend Knowledge

How can the id attribute of the 2nd baz element from the XML string below be retrieved from the Simp

How can the id attribute of the 2nd baz element from the XML string below be retrieved from the
SimpleXML object found inside $xml?
<code>
<?xml version=’1.0′?>
<foo>
<bar>
<baz id=”1″>One</baz>
<baz id=”2″>Two</baz>
</bar>
</foo>
</code>

A.
$xml->getElementById(‘2’);

B.
$xml->foo->bar->baz[2][‘id’]

C.
$xml->foo->baz[2][‘id’]

D.
$xml->foo->bar->baz[1][‘id’]

E.
$xml->bar->baz[1][‘id’]