1. Answer: D) He first sees them as an unthinking mass but wants to humanize them.
In this poem, Sandburg first sees hats merely as objects, as an unthinking mass, which it's clear when he says “I looked down and saw: hats: fifty thousand hats,” but at the end, he tries to see and treat them as humans when he asks them about their high hopes as if they could answer and as if they could have hopes.
2. Answer: B) The abrupt line breaks slow the reader down.
Williams' use of line breaks intends to makes us read the lines in a slow manner, and to forces us to consider a single line and word at a time so that we can fully reflect on the meaning of each word.