Which of the following is considered a Service Ribbon?

The Army Service Ribbon is considered a Service Ribbon because it is awarded to recognize service in the U.S. Army under certain conditions. This ribbon signifies that the service member has completed initial entry training and has been assigned to a duty position. It is an official military decoration and is part of the Army's awards and decorations program.

The other options represent different types of accolades. The Good Conduct Medal is a medal awarded for exemplary behavior, efficiency, and fidelity in active federal military service. The Combat Action Badge, on the other hand, is a badge that recognizes soldiers who personally engage or are engaged by the enemy, and the Sapper Tab identifies soldiers who have successfully completed the Sapper Leader Course, demonstrating proficiency in combat engineer tasks. While all of these are significant recognitions, only the Army Service Ribbon falls under the category of service ribbons specifically.