Question: A database administrator is optimizing a database with a large number of records. The database stores customer information, including their name, address, and purchase history.

A database administrator is optimizing a database with a large number of records. The database stores customer information, including their name, address, and purchase history. The administrator wants to improve query performance by indexing the database table properly. Identify the relevant attributes that should be indexed and explain why indexing them would improve query performance.

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