I am not quite sure what the answer is
The answer is;
A) the history of the Aztecs, C) the civic duties of citizens and D) the art of warfare
But at home Japan's failure to gain an indemnity to pay for the heavy war costs made the treaty unpopular .
Trench warfare ultimately hindered the progress of the war because it drew it to his stand still because neither side could advance.
The answer to your question is C. Hoped this helped