Which class of supplies includes repair parts and components?

The correct choice for identifying the class of supplies that includes repair parts and components is Class 9. Class 9 supplies specifically encompass repair parts and components that are essential for maintaining and operating military equipment and vehicles. This class includes items necessary for the repair and maintenance of other supply classes but does not cover basic consumables or service supplies found in other classes, such as medical supplies or fuels.

In the context of military logistics, understanding the class system is crucial for effectively managing and allocating the various types of supplies needed to ensure operational readiness. Class 9 serves as a critical category that ensures that necessary parts and components are included to support maintenance operations, thereby allowing for the seamless functioning of equipment in the field.