The irony is that they are smiling with “torn and bleeding hearts”.
The idea it emphasizes is that they are smiling to hide their pain.
The overall message revealed by the irony is that they are in considerable emotional turmoil and faking happiness to mask their distress.
The Dead Sea, being under sea level naturally, has a negative elevation of 1,312 feet.
Analysis is the part in which the author explains why they used a particular piece of evidence
I was not able to find a similar question on the internet, but the following excerpt would lead me to believe that it's Letter D.
An excerpt "The Great Expectations enter into the story when Mr. Jaggers takes Pip to London to make a gentleman of him." <span>Pip is living the life of a London playboy. He adapts to his new lifestyle, which includes spending money at a great rate to the point that he is a negative influence on Herbert, his best friend. I'd say it's not the letter A since Pip and Herbert have a positive relationship towards each other. It's not letter B also since it didn't mention him helping his family when he was in London. So it can either be C or D.</span>