Which of the jobs discussed in this unit can you get with a community college education or around two years of vocational training?

Which of the following would not be a good supporting sentence for an example paragraph with the following topic sentence?

Assuming that the character maydelle is a symbol what does she most plausibly represent

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.