Why would Zappos include the shuttle driver as a part of the interview process?

Multiple Choice

It is required by law.

If the candidate ignores or is rude to the shuttle driver, they are is not likely to fit into the friendly culture at Zappos.

This is typical of an organic structure.

It is a test to see if the candidate talks too much and therefore might blurt out company secrets at a later date.

A shuttle driver can ask questions that a manager cannot legally ask in a formal interview.