For Any Relation R, If, for Every Valid Instance of A

question 88

Multiple Choice

For any relation R, if, for every valid instance of A, that value of A uniquely determines the value of B:

• A) then a primary dependency exists in the relation.
• B) then A is said to be functionally dependent on B.
• C) then B is said to be functionally dependent on A.
• D) then A and B are candidate keys for the relation.
• E) None of the above is true.

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Definitions:

Grandparents

The parents of one's parents, who play varying roles in family structures from caregivers to sources of wisdom.

Nuclear Families

A family unit that includes only parents and their children, regarded as a basic social unit.

Two-Parent Homes

Households in which children are raised by both biological or adoptive parents, often associated with positive developmental outcomes for children.

Single-Parent Homes

Households in which one parent is responsible for raising one or more children.