Modality Refers To

Multiple Choice

Modality refers to:

A) Relationships of one-to-one;one-to-many;or many-to-many
B) Whether a child entity can exist with or without a related instance in the parent entity
C) The hierarchical structure that was developed in process models applied to data models
D) The number of attributes generated by an entity
E) Whether the entity has a unique identifier (aka 'primary key') or a concatenated identifier (aka 'composite key')