What kind of complement is the word difficult in this sentence limited space makes setup difficult?

What do critics say about art happenings and flash mobs

Which literary device does orwell most use to support his purpose in writing in this passage? characters, to show that what happens on the farm is fiction allegory, to show similarities between the farm and the soviet union point of view, to show how the characters think about the murders setting, to show that events in the soviet union may have been caused by the economy

Read this passage from "the pedestrian" by ray bradbury: which sentence best describes the overall impact of the setting?