That twenty-one ceramic dog figurines were discovered during the excavating of a 1,000-year-old Hohokam village in Tempe, Arizona, has nearly doubled the number of these artifacts known to exist.

1. That twenty-one ceramic dog figurines were discovered during the excavating

2. Twenty-one ceramic dog figurines discovered at the excavation

3. Discovering twenty-one ceramic dog figurines at the excavating

4. Ceramic dog figurines, twenty-one of which were discovered during excavating

E     The discovery of twenty-one ceramic dog figurines during the excavation

这道题的B项错在哪里啊？ 介词at? 还是说用名词形式不好？

从逻辑意思上看，double的动作发出者应该是discovery这件事本身，而不是那些发掘

出的瓷器。