大牛帮我分析下ABC ，多谢！

斯巴达

20 GWD17-Q20:
Construction of the Roman Colosseum, which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, was completed a decade later, during the reign of Titus, who opened the Colosseum with a one-hundred-day cycle of religious pageants, gladiatorial games, and spectacles.

A.    which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian,
B.    officially known as the Flavian Amphitheater, begun in A.D. 69, during the reign of Vespasian, and
C.    which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, and
D.    officially known as the Flavian Amphitheater and begun in A.D. 69, during the reign of Vespasian it
E.    officially known as the Flavian Amphitheater, which was begun in A.D. 69, during the reign of Vespasian, and

lxw19

是选C吗？
通过时态首先排除了B，因为用了过去分词begun

C. 中的during the reign of Vespasian作为插入语修饰前面的AD69，and作为并列练此连接两个动作~~

整个结构：Construction。。。begun in。。。and was completed。。。

janelby

选什么啊？？
BDE的逻辑主语和语法主语也就是句子主语不一致。所以用WHICH。句子结构和楼上MM一样，同意选C~