Answer:
The line which indicates that good times do not last forever is:
Nothing gold can stay
Explanation:
Robert Frost in his poem "Nothing Gold Can Stay" talks about the inevitability of the things. He illustrates this by using the example of the crops which grow, ripe and then are cut down. Life is just the same as the crops which have to end someday or another. He adds that even the good and beautiful thing will see their end someday.
It is either cause or effect or problem and solution.
Hope this helps:)
I think it would either be A or C
I think it might be C
A press release is concise and factual.