Which of the following items is NOT utilized in Magento’s implementation of EAV-based data models?

An entity table for storing the entities' basic information

One or more tables to store the entities' associated pieces of information

A two-column cross-link table to associate attribute values with a corresponding entity

Foreign keys on each relevant table to connect relevant pieces of information at the database level

An attribute table that defines what data (and of what type) may be stored on a particular entity