Final answer:
The dedup command is used to remove duplicate field values in search results, helping to ensure that each record is unique based on specified fields.
Step-by-step explanation:
The command that removes duplicate field values in search results is C) dedup. This command is commonly used in search processing languages in various data analysis tools. When you use the dedup command, it filters out the duplicate records based on one or more fields, leaving only unique record entries in the search results. For example, if you have multiple events with the same ID and you don’t want to count them multiple times, you would use dedup ID to remove the duplicates from your search results.