That sentence is incorrect.
The placing of comma after the word but is inappropriate.
The correct punctuation would be : He does not speak often, but when he does, everyone listens
hope this helps
Taking the whole poem into account, I think the correct answer must be C.
The jar is a small, common, impersonal object, but in Stevens' view, it affects the nature, depriving it of its inherent wilderness. Although it is one of a thousand, it still has the power and dominion over nature. Its meaningless existence leaves a negative trail in this world. If the jar was regarded as faceless a person living in a highly commercialized, industrialized world, and the nature as freedom, the parallel would be all the more effective.
B-Perspective.
Perspective is the point of view each person see something as.
-Steel jelly.
I would say West Berlin Is Free and Failing and East Berlin Is communist and Failing... hope this helped