Answer:
Ensure proper labeling by appropriately marking all classified material
Explanation:
A good practice to protect classified information is by labeling them with appropriately marking materials.
Classified is when something is arranged in classes.
Labeling is when something is assign to a category.
Material is the matter from which a thing can be made.
To learn more about classified materials and labeling refer
https://brainly.com/question/13111707
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