Does the sentence contain faulty parallel structure?

the pony express not only was a great success but also a great public service.

a. yes
b. no

Read the excerpt from “the railroad earth.” o well anyway i'll be learning eventually to like the railroad and sherman will like me some day, and anyway another day another dollar. the narrator of this excerpt can best be described as friendly.optimistic.wealthy.intelligent.

Read the excerpt below and answer the question. for a long time she held her neck erect; then her head sank, slowly. her ribs swelled with a mighty heave and she went over. as it is used in this excerpt from “the man who was almost a man,” the phrase “went over” most likely means died escaped jumped vomited

Read the excerpt from "the love song of j. alfred prufrock." and indeed there will be time to wonder, “do i dare? ” and, “do i dare? ” time to turn back and descend the stair, with a bald spot in the middle of my hair— [they will say: “how his hair is growing thin! ”] my morning coat, my collar mounting firmly to the chin, my necktie rich and modest, but asserted by a simple pin— [they will say: “but how his arms and legs are thin! ”] do i dare disturb the universe? in a minute there is time for decisions and revisions which a minute will reverse. which lines indicate that the speaker is concerned about what others think of him?