Answer:
A counter-argument is used as backup to either: Explain how your own thought and reasoning are right, or to enlighten the writer and the readers about why you think the main argument is incorrect. In an argumentative essay, a counter-argument could even do both, explaining your belief and your reason to believe something is correct or incorrect.
Explanation:
What areas are affected by one star shin and the pill
Reading words in appropriate sets rather than one-by-one is called: Phrasing
C and D do not factor into characterization.