- The dog quickly fetched the ball.
- Quickly fetched the ball, the dog.
- The ball fetched the dog quickly.
- The dog fetched quickly the ball.
The correct sentence structure in English is Subject-Verb-Adverb-Object. The subject (the dog) should be followed by the verb (fetched), then the adverb (quickly), and finally, the object (the ball). The correct option (a) follows this structure.
