the song dynasty succeeded in\nreunifying several kingdoms.\nreunifying all the tang territory.\nbreaking up…

the song dynasty succeeded in\nreunifying several kingdoms.\nreunifying all the tang territory.\nbreaking up several kingdoms.\nbreaking up all the tang territory.

the song dynasty succeeded in\nreunifying several kingdoms.\nreunifying all the tang territory.\nbreaking up several kingdoms.\nbreaking up all the tang territory.

Answer

Brief Explanations:

The Song Dynasty reunified several kingdoms. It did not reunify all the Tang territory (for example, there were regions like parts of the northwest that were not fully under its control in the same comprehensive way as the Tang at its peak). And it was about reunification rather than breaking up kingdoms or Tang territory.

Answer:

reunifying several kingdoms.