The phrase "All went lame; all blind" belongs to the poem "Doce et Decorum Est" by Wilfred Owen. This poem refers to some experiences that the soldiers have to live in time of war.
Considering the options, it can be said that all of them allude to the war; nevertheless, the first alternative is very general because talks about all the human beings, and the poem only makes mention to soldiers. For that reason, the first option is not the correct one.
The second alternative is more specific because it refers to the soldiers, and it can be infer that even though the soldiers were lame or blind, they were also affected by the war. So, this option is the correct answer.
The third option is not correct since the stanza one of the poem does not make reference to any hiden or unseen enemy.
And finally, the last option is incorrect because in the the first Stanza of the poem, it is made a description about the soldiers' experience in war, but it does not refer to any emotion.