Which Gmail policy type can alter the inbound route of email for specific users?

The correct choice, which is default routing, is the policy type that allows you to change the inbound routing of email for specific users. This type of policy is particularly useful when certain users have unique routing requirements or when an organization needs to implement specific routing rules based on business needs.

Default routing policies enable administrators to set up specific parameters that determine how incoming emails are handled, including rerouting emails to different destinations or filters based on defined criteria. This can include adjusting how emails are delivered to specific groups or individuals, ensuring that critical communications follow the appropriate route within an organization's email infrastructure.

In contrast, spoofing protection focuses on identifying and mitigating emails that seem to come from an untrustworthy or unauthorized sender, helping to protect organizations from phishing attacks but not directly altering email routes. Email signature policies apply to how email signatures are appended to sent messages and do not influence how incoming emails are routed. Content compliance policies ensure that emails meet specific content criteria but are not designed to manage the actual routing of inbound mail.