It is most likely D.adj-describes
In this passage, Reagan talks about the pain that the Holocaust go through.
<u>Explanation:</u>
The most important fact that has been talked about in this passage by the President Reagan is about the pain that the Holocausts have gone through in their lives.
They said that even though the wounds have dried up now but still the pain and the wound will not be forgotten ever. Those holocausts have done a really important and significant service to the mankind and they will never be forgotten for this service.
1) under the weather means not feeling well.
2) It means that a person is currently unemployed — having quit, been fired, or laid off from his or her previous job, or the previous job was temporary and has now ended — and the person has not yet found a new job.
acid chowder, barking at the ants, the big spit, arguing with the worms, etc.
well-seasoned, experienced, elderly, time lasted, antique
C is the choice I would make because I believe the writer is planning to answer this question: "and how come we think dogs are so smart". The writer never tells us what dogs can't do (a) or mention others being dumb (b) and doesn't make fun of humans (d)