Which line from "the secret life of walter mitty" best develops walter's character? a. "you're not a young man any longer." b. "the old man'll get us through, they said to one another ." c. "they're so d--n cocky, thought walter mitty, walking along main street; they think they know everything." d. "then, with that faint, fleeting smile playing about his lips, he faced the firing squad; erect and motionless, proud and disdainful, walter mitty the undefeated, inscrutable to the last."