Answer:
They were offered special treatment from the Nazis.
Explanation:
I'm not 100% sure if this is correct. I'm very sorry if it's wrong. :(
I think it is the second sentence because its explaining what it looks like; sticky,black tar and its also explaining to you what it does in the summer heat; it shimmers.
Hope this help!
D. the central message or insight revealed through a story or poem
Holmes thinks it is a good idea because Sir Henry is being followed and it would be easier to find out who if they were at Baskerville Hall instead of in London with millions. there is not alot of people at Baskerville Hall