Answer:
c) search operators
Step-by-step explanation:
Words or symbols that help you narrow down your search are called search operators. This ultimately implies that, search operators are commands and special characters (words or symbols) which help users to filter and refine their search engine results by making the search more precise and specific in nature. Thus, search operators only provide search engine results that are relevant to what a user is searching for or it narrow down the focus of a search.
Hence, search operators comprises of commands and special characters (words or symbols) such as AND, OR, NOT, "", -, +, *, .., :, etc used for narrowing down search engine results.
For instance, typing "file.mp3" in a search engine would only present results that are in mp3 formats.