Answer:
B.to introduce the new characters
The lines "the bitter waters of captivity had worn" show how the doctor has been through many tough situations and problems, but the lines "<span>he covered up their tracks with a determination </span>" show how he does not want to show how much he actually has been throught. Hope it helped :)
<span>The response people gave when they read about the horrible devastation and offered to give money and their effort
A lot of people read and heard about what happened and realised the great need that is required in order for things to return to the way they were and even if it's not to the way they were at least to help the victims to be able to start their lives again.So people responded well</span>
Either A or B, because somber means dark or dull in tone, gloomy.