<Tr> <Td> </Td> <Td> 958 est . </Td> <Td> 800,000 km (310,000 sq mi) </Td> </Tr> <Tr> <Td> </Td> <Td> 980 est . </Td> <Td> 3,100,000 km (1,200,000 sq mi) </Td> </Tr> <Tr> <Td> </Td> <Td> 1127 est . </Td> <Td> 2,100,000 km (810,000 sq mi) </Td> </Tr> <Tr> <Td> </Td> <Td> 1204 est . </Td> <Td> 1,800,000 km (690,000 sq mi) </Td> </Tr>

Which of the following describes the song dynasty of china