Which of the following is an example of an open-ended question ? a. is texting while driving banned in the city of texas? b. what have been the effects of state bans on texting and driving? c. how many states ban texting while driving? d. does new york city ban texting while driving?

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.