In the story the older people were telling the story and when someone asked "When was that" they replied "Very long ago" and they continue to say "beyond the memory even of their great-grandfathers. So with this evidence from the passage what would be the most suitable answer ? I would say the answer should most likely be history.
A :) The poem is both a celebration and a warning
The answer is D. because excavate and unearth mean the same.
The fame of Hidesato's fortune spread far and wide, and as there was no need for him to spend money on rice or silk or firing, he became very rich and prosperous, and was henceforth known as My Lord Bag of Rice.