The answer is C. "the man's behavour led me to guess...upset in someone."
Sentences A and B describe the actions and manners, showing the man's behaviour and anxiety: casting quick glances, his foot beating on the hot pavement etc. appearing he could even explode with anger. At some point (C), <em>he changed and just got calm, wainting silently, leading the speaker to wonder if the cause of all this could be the bus' delay.</em>
A compound
hopefully that helped ;)<span />
<span>"two different writers have made Rosencrantz and Guildenstern into main characters"
The other three options might be true, but they are not directly stated in the passage. The only clear statement that the author makes is that two different authors (Stoppard in "Rosencrantz and Guildenstern are Dead" and Gilbert in "Rosencrantz and Guildenstern") took those two characters and make them the focus of their play.</span>
