- The children played the whole day today.
- The children played today the whole day.
- Today the children played the whole day.
- The whole day played the children today.
The correct sentence structure in English is Time-Subject-Verb-Object. The time (today) should come first, followed by the subject (the children), the verb (played), and finally, the object (the whole day). The correct option (c) follows this structure.
