Final Answer:
An entity type name should be all of the 4) Case-sensitive.
Step-by-step explanation:
An entity type name should be all of the 4) Case-sensitive.
An entity type name should be unique, descriptive, and meaningful for effective database design. However, whether the entity type name is case-sensitive or not is typically a matter of convention or the specific rules of the database management system being used. In many database systems, entity type names are not case-sensitive, meaning that "Customer" and "customer" would be considered the same. Therefore, being case-sensitive is not a necessary characteristic for an entity type name. The emphasis is more on uniqueness, descriptiveness, and meaning to ensure clarity and precision in database modeling.