Final answer:
A Secure Token will be sent for the upgrade to VSA 10 to proceed, which is a method of authentication to ensure only authorized users can make the upgrade.
Step-by-step explanation:
If a user account is selected for the upgrade to VSA 10, a Secure Token will be sent for the upgrade to proceed. When upgrading security-related software or systems, a secure token is often used as a method of authentication. It's a way to ensure that the person requesting the upgrade is indeed authorized to make such changes. Tokens typically provide a one-time code or key that validates the user's identity and authorizes the upgrade process. This is a more secure approach than using static passwords which can be more easily compromised.