The correct answer is: D. bank
A bank is a financial institution that provides a variety of financial services to its customers, including checking and savings accounts, loans, and investments. Banks also hold a large amount of customer data, such as names, addresses, Social Security numbers, and account information. This data is essential for banks to operate, but it is also sensitive and must be protected from unauthorized access.
Data preparation is the process of cleaning and organizing data so that it can be used for analysis or reporting. This process can be complex and time-consuming, especially for large datasets. In a bank, data preparation is especially difficult because of the sensitive nature of the data. Banks must take extra precautions to ensure that their data is secure and that it is not accessed by unauthorized individuals.
The other options are not as difficult as a bank when it comes to data preparation. A college or university has a lot of data, but it is not as sensitive as data in a bank. A supermarket has a lot of data about its customers, but it is not as sensitive as data in a bank. A hospital has a lot of data about its patients, but it is not as sensitive as data in a bank.
In conclusion, data preparation would be most difficult in a bank because of the sensitive nature of the data.