Under which object is Abigail's account likely to reside after her promotion?

After Abigail's promotion, her account is likely to reside under the "Builtin" object due to the nature of how access control and user management typically function in a computing environment. The Builtin container is used to store built-in accounts and groups that are typically found in the system's environment, such as user roles with specific privileges or administrative functions.

When a user is promoted, their role often undergoes a change in administrative privileges, aligning them with the built-in accounts that handle essential operational tasks within the system. This organization helps maintain a clear hierarchy and access structure, ensuring that accounts with elevated privileges are easily manageable and recognized as part of the system's core structure.

The other options, while important in user management, do not directly correlate with the elevated status and special permissions that come with a promotion. Users would refer to individual accounts, Groups involve collections of users that can be managed together, and Domain typically relates to a broader network that includes a variety of users and resources but doesn’t specifically signify the enhanced privileges associated with Abigail’s promotion.