Answer:
C
Explanation:
C.argv[0]: "program.py"
argv[1]: "-r"
argv[2]: "input.dat"
argv[3]: "output.dat"
is the right answer. as 0 argument is always the script. We can find this by importing sys and using the command sys.argv. And like len(sys.argv) will give total number of arguments.
the vampire diareas
the two on the bottom and the two on the top
move the two on the bottom apart and the two on the top inward
use google