Which parts of the text are matched in the following regular expression?
<code>
1 <?php
2 $text = <<<EOT
3 The big bang bonged under the bung.
4 EOT;
5
6 preg_match_all(‘@b.n?g@’, $text, $matches);
7 ?>
</code>

A.
bang bong bung

B.
bang bonged bung

C.
big bang bong bung

D.
big bang bung