Question

weapons and armor are a countrys tools of violence. a warlike country, however huge and safe it may be, will end up declining and endangering its populace. military force cannot be entirely eliminated nor used all the time. teach people military arts when they are free from farming in order to equip them with a sense of military decorum and morale. . . . confucius said,
ot teaching people how to fight is the same as discarding them.\ hence military might serves to benefit the realm. this is the gist of the art of war. background information: taizong was the second emperor of the tang dynasty. when does taizong want his officials to train the people for war? in the springtime when they are not busy farming during peacetime after war has begun

Explanation:

The text from the left box says "Teach people military arts when they are free from farming". So we need to find the option that matches this. The option "when they are not busy farming" is the same as being free from farming. The other options: "in the springtime" isn't mentioned, "during peacetime" isn't the condition given, and "after war has begun" is opposite to the idea of training when free from farming (not when war starts).

Answer:

B. when they are not busy farming