Final answer:
The least likely covered member is the staff accountant assigned to perform basic and routine audit functions on the Snow-Town, Inc. audit.
Step-by-step explanation:
According to the AICPA Code of Professional Conduct, a covered member is an individual who could influence the outcome of the audit or has direct or indirect financial interest in the client. Therefore, the individual least likely to be considered a covered member is option A, an auditor who is a staff accountant assigned to perform basic and routine audit functions on the Snow-Town, Inc. audit but has no managerial responsibilities in the audit firm. This is because the staff accountant does not have the authority or influence to affect the audit process or have any financial interest in the client.