What information must a UML class diagram box include by convention to fully describe a class definition at a summary level?

Introduction / Context:
UML class diagrams depict classes as rectangles subdivided into compartments. These compartments convey the class’s identity and its structural and behavioral features, serving as a concise blueprint for developers and stakeholders.

Given Data / Assumptions:

• Standard UML uses up to three compartments: name, attributes (properties), and operations (methods).
• Notational subsets are allowed, but the full depiction includes all three for clarity.
• Visibility indicators (+, #, -) and type/return annotations may also appear.

Concept / Approach:
A complete class depiction includes: the class name (identity), attributes (state), and operations (behavior). Therefore, the most inclusive and correct answer is that all of these may be included in the class box.

Step-by-Step Solution:

Verification / Alternative check:
Open any UML reference: examples consistently show Name | Attributes | Operations.

Why Other Options Are Wrong:
Choosing any single compartment omits essential aspects (state or behavior or identity) and is therefore incomplete.

Common Pitfalls:
Confusing class diagrams with object diagrams (which sometimes show slot values), or omitting operations in analysis models where behavior still matters.

Final Answer:
All of the above.