Question 20

Accidents do not just happen; they are usually caused by a lack of attention.

This sentence is punctuated correctly as it uses a semicolon to connect two independent clauses, indicating a close relationship between the ideas presented.

A) Accidents do not just happen; they are usually caused by a lack of attention.

This option is correct because it appropriately uses a semicolon to separate two independent clauses. The semicolon functions effectively here, indicating that the second clause expands on or explains the first clause.

B) Accidents do not just happen, they are usually caused by a lack of attention.

This option is incorrect because it uses a comma to connect two independent clauses without a coordinating conjunction. This creates a comma splice, which is a grammatical error.

C) Accidents do not just happen they are usually caused by a lack of attention.

This option is incorrect as it lacks any punctuation between the independent clauses. Without punctuation, the sentence becomes a run-on, making it difficult for readers to understand the connection between the two ideas.

D) Accidents do not just happen: they are usually caused by a lack of attention.

This option is also incorrect because it uses a colon, which is generally used to introduce a list, an explanation, or a quote, rather than to connect two independent clauses. Although the second part explains the first, a semicolon is more appropriate in this instance.

Conclusion

Option A stands out as the only grammatically correct choice due to its proper use of the semicolon, effectively linking two related independent clauses. The other options either commit errors such as comma splices or run-ons, or misuse punctuation, failing to convey the intended relationship between the ideas clearly.