Reference:
The fishbucket is a directory that stores information about the files that have been monitored and indexed by Splunk. The fishbucket helps Splunk avoid indexing duplicate data by keeping track of file signatures and offsets. To reset the fishbucket for one source, the command splunk cmd btprobe can be used with the -reset option and the name of the source file. Therefore, option C is the correct answer. Reference: Splunk Enterprise Certified Admin | Splunk, [Use btprobe to troubleshoot file monitoring - Splunk Documentation]