Question

Once I built a railroad, made it run,
Made it race against time.
Once I built a railroad,
Now it's done—

Which idea is conveyed in the excerpt?
The speaker does not want to build rails anymore.
All the necessary railroad tracks have been completed.
The American railroads are the fastest in the world.
The speaker used to have work, but now there isn’t any.

Answer 1

All the necessary railroad tracks have been completed.

Explanation: The speaker describes having built the railroad and made it run, then says "now it's done," indicating the project is finished — not a comment about desire, speed compared to other railroads, or explicitly about employment.