"D. spare, simple" would be the best way to describe the sets of plays during Shakespeare's day, since the theatre was still considered a "lower class" form of entertainment.
I believe that the answer is “C” because your discussing pollution and that recycling is beneficial and the other answers provided aren’t as strong as this one !
It might be Mrs. Flowers is aware of how other people feel
Setting: John Henry and his race against a steam drill may both be real, so the song has a very specific setting in place and time. ... Therefore, the song's setting can't be fixed with complete certainty. For many years, the Big Bend Tunnel on the C&O line in West Virginia was identified as the site of the historic battle.
hope this helped :D Have a lovely day!