[1] Granville Woods, a nineteenth-century inventor, made significant contributions to the safety and efficiency of the American railroad system. [2] His most notable creation was the induction telegraph, which allowed moving trains to communicate with dispatchers and other trains. [3] Prior to this invention, communication was extremely difficult and slow. [4] By sending messages through magnetic fields, the device prevented countless accidents and kept schedules running smoothly.
The writer wants to revise Sentence 3 to support the claim that the induction telegraph was a vital safety improvement for railroads. Given that all the choices are true, which choice most effectively accomplishes this goal?
- conductors of moving trains were unable to receive urgent alerts about oncoming trains or track hazards, often leading to fatal collisions.Answer
- Bcommunication was extremely difficult and slow.
- CWoods patented his induction telegraph in 1887, it was a major milestone that protected his intellectual property.
- Doperators could not easily contact moving trains; which made coordinating schedules a dangerous guessing game.
Answer
The option stating that conductors of moving trains were unable to receive urgent alerts about oncoming trains or track hazards, often leading to fatal collisions.
The correct option provides concrete, detailed evidence of the safety hazards (oncoming trains and track hazards) that conductors faced before the telegraph was invented. This directly supports the claim that the invention was a vital safety improvement. Additionally, it is grammatically correct.
Step-by-Step Solution
Key Concept
Supporting Claims with Evidence and Details
Estimated Time:1m 0s