Question 15

The best version of the quoted portion is "example; because."

Using "example; because" effectively connects the idea of the airplane as an example with the reasoning that follows, enhancing the clarity of the statement.

A) (as it is now)

This option lacks proper punctuation, making the sentence feel incomplete and less formal. It does not effectively link the two parts of the statement, which can lead to confusion regarding the relationship between the airplane and the inspiration drawn from birds.

B) example,

While this option uses a comma, it fails to provide a complete thought. The use of a comma does not adequately connect the two clauses, leaving the reader expecting further information that is not provided.

C) example because

This option introduces a subordinate clause without proper punctuation. The lack of a semicolon or conjunction creates a run-on feeling, which can obscure the intended meaning and disrupt the flow of the sentence.

D) example; because

This choice is correct as the semicolon properly separates the two independent clauses. It clarifies the relationship between the airplane serving as an example and the explanation that follows, enhancing the overall readability and coherence of the statement.

Conclusion

The option "example; because" is the most effective choice as it clearly delineates the connection between the airplane and the inspiration from birds. Other options either lack necessary punctuation or fail to convey a complete thought, resulting in ambiguity and reduced clarity. Therefore, option D is the best version of the quoted portion.