Discussion
One solution to the multivalued dependency constraint problem is to:
Answer: A
Correct answer: split the relation into two relations, each with a single theme.
A multivalued dependency problem arises when one relation holds two independent multivalued facts about the same key, forcing every combination of the two to be stored. Separating them into two relations, each carrying a single theme, removes the spurious combinations entirely - and this is exactly what putting the relation into fourth normal form means.
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