Consider Relations X and Y, Each Representing One of Two

question 22

Multiple Choice

Consider relations X and Y, each representing one of two entities in a many-to-many binary relationship. Relation Z is the additional relation created to store the many-to-many relationship. Intersection data ____.

• A) is stored in relation X or in relation Y, but not in both
• B) must be stored in both relations X and Y
• C) is stored in relation Z
• D) is stored in all three relations X, Y, and Z
• E) cannot be stored in any of relations X, Y, or Z

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Definitions:

Lactose

A sugar that is the primary constituent of fresh milk.

Biological Diversity

Refers to the variety and variability of life forms within a given ecosystem, region, or on the entire planet. It encompasses the diversity of species, their genes, and the ecological complexes they are part of.

Melanin

A pigment found in skin, hair, and eyes that determines color and provides protection against ultraviolet light.

Skin Color

The pigmentation of a person's skin, primarily determined by genetic inheritance and exposure to sunlight, which can vary significantly among individuals and populations.