B - agenda
An agenda is what the author really wants to point out (their underlying message) and it's typically written in a way where it's somewhat hidden. Example: political ads - they have an agenda for what they want to talk about and why it's important.
I would say wait until the teacher finishes saying what needs to be said try not to interrupt them mid-sentence or if they keep rambling on and on , simply just raise you hand and say excuse me (teachers name) sorry to interrupt but could you help me on this or take a second to explain this for me. Hope this helped
Answer:
C
Explanation:
A and D don't detail how the air smelt
B is talking about life in the campground while C is talking about the nature around the campground (on the mountain presumably)