- Slowly, the turtle, crossed, the road.
- The turtle slowly crossed the road.
- Crossed the turtle slowly the road.
- The turtle crossed the road slowly.
The correct sentence structure in English is Subject-Adverb-Verb-Object. The subject (the turtle) should be followed by the adverb (slowly), the verb (crossed), and finally, the object (the road). The correct option (b) follows this structure.
