Which of these could be a main idea?

Question 3 of 10 points which sentence is an example of chronological structure in "the city without o a. without daily pumping, manhattan's subway tunnels would be flooded o b. some time in the next 100,000 years, glaciers will cover all of manhattan o c. central park has a garden that houses plants mentioned in shakespeare's plays. o d. if flooding were to go unchecked, steel support beams in buildings would rust

1. imaginary persons in a novel believable characters 2. characterization long prose narrative 3. real in the fictional world of the novel creation of characters 4. the novel world of fiction 5. world of the novel characters i need the answer

Why is broadway known as the great white way kown as great white way?