A Clarity because clarity means the same as "how clearly". Or the measurement of "how clear something is", like the clarity of water. If you practiced new Vocab words with good clarity or with clarity, it means you understand them and can spell them well.
        
                    
             
        
        
        
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>
 
        
                    
             
        
        
        
Answer:
The definition of the word foul:
1. This can be used to describe a play that doesn't count in a sports game.
2. This can be used to describe something very disgusting or gross.