What is the effect of the -v option for the grep command?
A. It enables color to highlight matching parts.
B. It shows the command’s version information.
C. It only outputs non-matching lines.
D. It changes the output order showing the last matching line first.
E. It outputs all lines and prefixes matching lines with a+.
Confirmed: https://www.man7.org/linux/man-pages/man1/grep.1.html