The correct answer is: C. Master file
A master file is a file containing relatively permanent data. It is used to store data that is not frequently updated, such as customer information, product information, or inventory levels. Master files are typically organized in a way that makes it easy to find specific records, such as by using a primary key.
A random file is a file that is not organized in any particular order. This makes it difficult to find specific records in a random file. Random files are typically used for data that is updated frequently, such as transaction data.
A transaction file is a file that contains data about transactions that have occurred. Transaction files are typically used to update master files.
A sequential file is a file that is organized in a linear order. This makes it easy to find specific records in a sequential file, but it can be slow to update sequential files. Sequential files are typically used for data that is not updated frequently, such as historical data.