Final answer:
The use of subsidiary ledgers provides several advantages, including tracking transactions for specific customers or creditors and maintaining a segregation of duties. However, they are not used to keep the records of a subsidiary company.
Step-by-step explanation:
The correct answer is c. To keep the records of a subsidiary company. Subsidiary ledgers are used to track detailed information about specific customers, creditors, or other subsidiary companies. They provide a way to show transactions affecting one customer or one creditor in a single account (a). Subsidiary ledgers also help in maintaining a segregation of duties in posting (b), as different individuals can handle different subsidiary ledgers. However, keeping the records of a subsidiary company (c) is not an advantage of using subsidiary ledgers as they are primarily used to track customer or creditor information. Finally, subsidiary ledgers are used to free the general ledger of excessive details (d), allowing the general ledger to maintain a concise summary of all the accounts.