Consider the following code segment:

1. <?php

2. require_once 'Zend/Mail.php';

3. ?????????????????????????

4. $mail->setBodyText('This is the test email.');

5. $mail->setFrom('somebody@example.com', 'Sender');

6. $mail->addTo('somebody_else@example.com', 'Recipient');

7. $mail->setSubject('TestSubject');

8. $mail->send();

9. ?>

Which of the following code snippets will you use at line number 3 to initiate Zend_Mail?