From Sunzi’s warning， we can infer that sometimes a war could be declared just because（）.

From Sunzi’s warning， we can infer that sometimes a war could be declared just because（）.
A.one country was under attack from another
B.the commander and general had a bad temper
C.the king or emperor just wanted to invade another country
D.the ruler was irritated for the time being
正确答案：the ruler was irritated for the time being