What is to pass through to gain secret information

The author attributes papa's unforgivable behavior to which of the following? a. the painful memories connected with his 9-month ordeal in south dakota b. papa's increasing addiction to alcohol c. papa's unfulfilled need to be in charge of something and/or someone d. mama's emotional distance from papa

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How would “in a station or the metro” change of the bough was bright and lovely rather than wet and black a: the station would seem cheerier b: the poem would not be considered imagist c: the people would seem less pleasant. d: the poem would no longer be hokku