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Difficulty: MediumSentence Fragments

The Roman Pantheon features a massive concrete dome that remains the largest unreinforced concrete dome in the world. Although modern engineers have analyzed the structure using advanced computer models. They still marvel at how the volcanic ash concrete has withstood seismic activity for nearly two millennia.

Which of the following choices best corrects the underlined portion of the passage?

  1. A
    NO CHANGE
  2. Although modern engineers have analyzed the structure using advanced computer models, theyAnswer
  3. C
    Although modern engineers have analyzed the structure using advanced computer models; they
  4. D
    Modern engineers have analyzed the structure using advanced computer models, they

Answer

Although modern engineers have analyzed the structure using advanced computer models, they
The correct choice, which uses a comma and a lowercase pronoun to connect the clauses, correctly joins the introductory dependent clause beginning with 'Although' to the main independent clause of the sentence.

Step-by-Step Solution

1
Analyze the structure of the original sentences to identify any grammatical issues.
The first sentence in the underlined portion begins with the subordinating conjunction 'Although', making it a dependent clause that cannot stand alone. The second sentence is an independent clause.
Recognizing clause types is essential for diagnosing sentence fragments.
2
Evaluate the choices to find one that correctly links these clauses without creating new grammatical errors.
The option that changes the period to a comma and uses a lowercase pronoun successfully connects the dependent clause to the independent clause.
An introductory dependent clause must be followed by a comma when it precedes the independent clause.
3
Verify that other options do not introduce new errors like comma splices or punctuation fragments.
Using a semicolon creates a fragment because the first clause is dependent. Removing the subordinating conjunction and using a comma creates a comma splice between two independent clauses.
A semicolon requires independent clauses on both sides, and a comma alone cannot join two independent clauses.

Key Concept

Correcting sentence fragments by properly linking dependent clauses to independent clauses.
Estimated Time:1m 0s
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Topics

Sentence Fragments

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