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Difficulty: MediumSubordination and Coordination

The following passage is about Granville Woods, a nineteenth-century inventor.

Granville Woods, a prolific inventor, dedicated his life to improving the safety of railway travel. His most famous creation, the induction telegraph, allowed moving trains to communicate with stations. Although this invention drastically reduced the frequency of collisions, but it also paved the way for modern transit systems.

Which of the following options best corrects the underlined portion in the passage?

  1. A
    NO CHANGE
  2. Although this invention drastically reduced the frequency of collisions, it alsoAnswer
  3. C
    Although this invention drastically reduced the frequency of collisions; it also
  4. D
    This invention drastically reduced the frequency of collisions, it also

Answer

The option that removes the coordinating conjunction 'but' and maintains the subordinating conjunction 'Although' with a separating comma is the correct choice.
The correct answer properly establishes subordination by beginning with the subordinating conjunction 'Although' to form a dependent clause, which is separated by a comma from the main independent clause. This maintains the logical contrast between the two points without any grammatical errors.

Step-by-Step Solution

1
Analyze the relationship between the clauses and identify the grammatical error in the underlined portion.
The underlined portion attempts to contrast the reduction of train collisions with the paving of modern transit systems. However, it uses both 'Although' (subordinate) and 'but' (coordinate), which is a double-conjunction error that results in a fragment.
Identifying redundancy in sentence connectors is necessary to establish proper subordination.
2
Evaluate the choices to select the one that resolves the error while keeping a correct logical connection.
The correct option removes 'but', leaving a single subordinating conjunction ('Although') at the beginning of the sentence to form a dependent clause, which is separated from the main clause by a comma. The other options either maintain the fragment, use a semicolon incorrectly, or create a comma splice.
Ensuring one independent main clause and one dependent clause resolves the fragment error.

Key Concept

Subordination and Coordination
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Topics

Subordination and Coordination

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