Final answer:
Wide rows are used in database management and are suitable for efficient filtering, grouping, and ordering of data within a database. All the given scenarios are correct applications of wide rows.
Step-by-step explanation:
In database management, wide rows refer to a row format where each row can have a large number of dynamic columns that can span across various column families. In the context of NoSQL databases or wide column stores, wide rows can be very useful in several scenarios, such as:
Efficient filtering: Wide rows are structured in such a way that they can be very efficient for queries that need to filter data based on certain column values.
Grouping: They can be effective for grouping data logically within a single row, which is similar to having multiple related records in a traditional relational database table.
Ordering: They support ordering of the columns within the row which enables efficient range queries.
Therefore, all the given scenarios - efficient filtering, grouping, and ordering - are suitable for the use of wide rows.