2.Since historical times, England, where the early inhabitants were Celts, has been conquered three times. It was conquered by_______.A:A.the Vikings, the Anglo-Saxons, and the Normans B:B. the Romans, the Anglo-Saxons and the Vikings C:C. the Anglo-Saxons, the Vikings and the Normans D:D. the Romans, the Anglo-Saxons, and the Normans 答案: D. the Romans, the Anglo-Saxons, and the Normans