The question appears to be asking about a concept related to databases, given the options provided. Let's analyze each option:
A) Normalization: This is a database design technique used to minimize redundancy and dependency by organizing fields and table of a database. The main goal is to divide large tables into smaller ones and define relationships between them to increase the clarity and efficiency of the database.
B) Indexing: This is a data structure technique used to quickly locate and access the data in a database. Indexes are created on database columns to speed up the retrieval of rows.
C) Referential integrity: This is a property of data which, when satisfied, requires every value of one attribute (column) of a relation (table) to exist as a value of another attribute in a different (or the same) relation. It is a key concept in relational databases to ensure data consistency.
D) Declustering: This is a technique used in distributed databases to spread data across multiple disks or nodes to improve performance and reliability. It is not as commonly discussed as the other options in the context of basic database operations.
Without a specific question, it's challenging to determine which option is the correct answer. However, each option represents a distinct concept in database management. If you have a specific question related to these options, please provide it for a more targeted response.
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