The correct answer is: C. -r option
The -r option to the cut command specifies the field separator. The field separator is a character that separates fields in a line of text. The default field separator is a space, but it can be any character.
The cut command extracts fields from a line of text. The fields are separated by the field separator. The cut command can extract all of the fields, or it can extract a specific range of fields.
The syntax for the cut command is:
cut [options] [-d delim] [-f start:stop] inputfile
The options are:
-d delim: The field separator.-f start:stop: The range of fields to extract.inputfile: The file to read from.
The cut command will extract the fields from the line of text in the input file, and print them to the standard output.
For example, the following command will extract the first two fields from the line of text in the input file:
cut -f 1-2 inputfile
The following command will extract the third field from the line of text in the input file:
cut -f 3 inputfile
The following command will extract all of the fields from the line of text in the input file:
cut -f - inputfile
The following command will extract the fields from the line of text in the input file, and print them to the standard output, separated by a space:
cut -d ' ' -f - inputfile
The following command will extract the fields from the line of text in the input file, and print them to the standard output, separated by a tab:
cut -d '\t' -f - inputfile
The following command will extract the fields from the line of text in the input file, and print them to the standard output, separated by a newline:
cut -d '\n' -f - inputfile