“__________” can best describe this: “Professor Pepin spends a lot of time translating medieval texts on ancient medicine, however, he also stays informed about the latest developments in modern asthma treatments.”

查士丁尼 A: first Roman emperor, ruled from 27BCE to 14 CE B: the Eastern Roman emperor from 527 to 565 C: founder of Carolingian dynasty D: son of Pepin the short