The user IDs can be added or removed using which of the following fixed roles?

Concept

SQL Server provides built-in fixed database roles, each scoped to one administrative responsibility. Managing who is permitted to connect to a database — that is, adding or removing database access (user IDs) for logins — is the job of one specific role, separate from managing data, security objects, or server-level administration.

Applying it here

The phrase “add or remove user IDs” maps to managing a login’s access to the database. By definition, db_accessadmin members can add or remove database access for Windows logins, Windows groups, and SQL Server logins (for example via CREATE USER / DROP USER). So the role that adds or removes user IDs is db_accessadmin.

Contrast with the other roles

• db_sysadmin — not a standard fixed database role; the powerful database-level role is db_owner, while sysadmin is a server-level (not database) role, so neither matches “add or remove user IDs”.

• db_securityadmin — manages permissions and role membership (GRANT/DENY, adding members to roles), but does not add or remove the database users themselves.

• “More than one of the above” — only a single listed role owns this responsibility, so this does not apply.

• “None of the above” — incorrect, because a listed role (db_accessadmin) does have exactly this capability.

Result

The fixed role used to add or remove user IDs (database access) is db_accessadmin.