What is the term for the error when a sentence is improperly joined without punctuation?

• A. This error is known as a fragment.
• B. This error is known as a run-on sentence.
• C. This error is known as a misplaced modifier.
• D. This error is known as a comma splice.

Answer: (D)

When two independent clauses are joined by only a comma, the writing has a comma splice. This is a specific punctuation mistake within the broader idea of a run-on, where sentences don’t connect properly. A fragment would be an incomplete sentence, so it isn’t about joining clauses. A misplaced modifier is about a word being connected to the wrong word. Run-on covers improper joining in general, but the exact fault described here—connecting two complete thoughts with just a comma—is best identified as a comma splice. To correct it, use a semicolon, add a coordinating conjunction after the comma, or split into two sentences.