For the following questions, select your answer
from one of the following three choices:
<p>
<ul>
<li> expat parser
<li> dom parser
<li> simpleXML parser
</ul>
<p>
<ol>
<li> If you need to modify the structure of your XML document, you should
	use this parser.
<p>
<li> If your XML document is too big to fit completely in memory, you should
	use this parser.
<p>
<li> This parser names accessor functions after the element tags. For example,
	you could access the cd children of an artist as $artist->cd.
<p>
<li> These two parsers create a tree structure to represent the XML document.
<p>
<li> This parser requires you to associate handlers with events, such as
	start_element, end_element, and data_content events.
</ol>