Question: What is the primary purpose of the operation described for a MnS (Management and Network Services) consumer interacting with a MnS producer, considering the optional time window specification?
Option 1: To upload files to the MnS producer based on a specified file data type.
Option 2: To retrieve a list of available files from the MnS producer, filtered by file data type and optionally by a specific time window (defined by beginTime and endTime).
Option 3: To delete files from the MnS producer that fall outside a specified time window for file ready time.
Option 4: To modify the file ready time of existing files on the MnS producer to match a new time window.
Explanation: This operation's main goal is retrieving a list of files based on their data type, with an optional filter for files ready within a specified time frame, showcasing the importance of targeted data retrieval in telecom network management.