1. A Recursive relationship is best described as:

1. Attributes that participate more than once in a relationship
2. Entities that participate more than once in a relationship
3. Multivalued attributes that participate more than once in a relationship
4. Key attributes that participate more than once in a relationship

2. Cardinality further defines:

1. Relationships between entities by placing the relationship in the context of numbers
2. Relationships between attributes by placing the relationship in the context of numbers
3. Relationships between multivalued attributes by placing the relationship in the context of numbers
4. Relationships between key attributes by placing the relationship in the context of numbers

3. In a Chen ERD, Cardinality is illustrated by:

1. Only the symbol M when there is a one to one relationship
2. Only the symbol N when there is a one to many relationship
3. Can be illustrated by M and N when there is a many to many relationship
4. Illustrated with a Y and M when there is a one to many relationship