The correct answer is: E. None of the above
A network schema is a type of database schema that allows for many-to-many relationships between entities. It does not restrict the structure to a one-to-many relationship, and it does not store data in tables.
A network schema is a type of database schema that allows for many-to-many relationships between entities. In a many-to-many relationship, one entity can have multiple relationships with another entity, and vice versa. For example, a student can take multiple classes, and a class can have multiple students.
A network schema is not the same as a relational schema. A relational schema is a type of database schema that stores data in tables. In a relational schema, each table represents an entity, and each row in a table represents an instance of that entity. For example, a table might represent students, and each row in the table might represent a different student.
A network schema is more flexible than a relational schema, but it is also more complex. A network schema is more difficult to design and implement, and it is more difficult to query.