Users, groups and a stated policy

These fictional cards describe identities and permissions. UID means
user ID; GID means group ID. A policy decides which administrative
requests are allowed. Account and group names alone do not describe
every permitted action. Classify each task using its stated policy.

These are not actual id/sudo outputs.
Example identity: uid=1000(desk), gid=1000(desk), groups desk and club.
Activity identity: ordinary user analyst; supplemental group learners.
Policy card: analyst may read own notes without sudo; admin-approved
package installation may run as root through sudo inside owned guest.
No actual policy grants are implied by these fictional cards.
Question account A: UID 0, unrestricted Linux administrator in this model.
Question account B: named guest, ordinary unprivileged account in this model.
Which account term names the administrator: root or guest?