Expressiveness describes which of the following?

• A. A limitation of query languages.
• B. A powerful query language enabling complex queries and broad applicability.
• C. A security feature for data encryption.
• D. A method for data normalization.

Answer: (B)

Expressiveness is about how powerful a query language is in describing and computing results. It captures the range of operations you can express—filters, projections, joins, aggregations, and even more advanced features like recursion or pattern matching. A language with high expressiveness lets you formulate complex queries and apply them across a wide variety of data tasks, which is why describing expressiveness as a powerful query language enabling complex queries and broad applicability fits best. The other options point to security, data encryption, or normalization, which are unrelated to how expressive the language is.