Identify the sentence fragment.
- A. Although the results were promising.
- B. The results were promising.
- C. The results, which were promising, were published.
- D. Promising results were published.
Explanation
A subordinating conjunction such as although turns the clause into a dependent one, so it cannot stand alone and needs a main clause to complete it. Adding one gives although the results were promising, further trials were needed. A fragment may contain a subject and a verb yet still be incomplete.