I did a 3 second google search for "tim o'brien" and the first thing that came up was the novel he wrote about the vietnam war called "The Things They Carried" written in 1990.
I think the answer is C. I think so beacuse "vast meaning of usefullness" means that life is too short for all the useful things to get done.
The sentence that shows that Icarus is reckless is "Who could remember to be careful when he was to fly for the first time?" Reckless is the opposite of careful. When Icarus was told to be careful, he did not even listened to his father as shown in the preceding sentence: "For Icarus, these cautions went in at one ear and out by the other."
The 3rd one I love it’s explanations