In this excerpt from "Ulysses" by Alfred, Lord Tennyson, which of the following is a recurring concept? A. the heroic exploits of Ulysses
B. the acceptance of circumstances created by fate
C. the knowledge of approaching death
D. the effects of difficulties of old age
E. the thirst of knowledge and new experiences​

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.