Sentence A is correctly punctuated.
I think I will wear tan pants and a green cotton shirt to school on Wednesday.
The other sentences have commas where they are not needed.
Answer:
The word “scrutinized” suggests that the government is not just idly watching the movements of its citizens, it is actively looking and picking apart everything they do to watch for any sort of infraction. The word “watched” would have had a much less ominous, as well as less active, feeling.