"Old Walt," like Whitman's poems, * 10 points
is short and contains a small idea.
is short and contains a large idea.
is short, regardless of the idea.
contains a large idea, regardless of the length

1. in which sentence is the underlined portion a predicate nominative? for astronauts, going into space to repair orbiting equipment becomes a challenge. for astronauts, going into space to repair orbiting equipment becomes tricky. for astronauts, going into space to repair orbiting equipment becomes challenging. for astronauts, going into space to repair orbiting equipment becomes frequent.