A. That twenty-one ceramic dog figurines were discovered during the excavating --- This isn’t a bad sentence; only thing is that the use of excavating instead of the excavation is rather not elegant. When there is a popular noun odor a word, the gerund is not the ideal thing to use.
B. Twenty-one ceramic dog figurines discovered at the excavation ---figurines and has nearly doubled- SV erro
C. Discovering twenty-one ceramic dog figurines at the excavating--- at the excavating is inelegant
D. Ceramic dog figurines, twenty-one of which were discovered during excavating --- figurines and has nearly doubled – SV error.
E The discovery of twenty-one ceramic dog figurines during the excavation—right choice; it is the act of discovery that pushes the number and not the 21 figurines. Correct expression.
Although both ‘at the excavation’ and ‘during the excavation’ are correct depending upon the context, here ‘during excavation’ is better since the figurines were found during the period of excavation. At the excavation will allude to a specific place.
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