What the knight’s changed attitude toward the old woman might suggest about human nature.

Arrange the events from hamlet in the order in which they occur, from first to last. hamlet contemplates suicide. the appearance of a ghost is reported. hamlet says he disapproves of his mother’s remarriage. fortinbras takes over the throne. hamlet verbally abuses ophelia. laertes is killed in a swordfight. ophelia dies. ↓ ↓ ↓ ↓

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.

Which fits best in the empty box above?