The correct response is: They imply the narrator considers the adventure a joke.
The words "racket," "sauntering," and "smirked" suggest a lighthearted, irreverent attitude toward what could be perceived as a scary experience. "Racket" implies noise and chaos, which the narrator seems to dismiss, "sauntering" indicates a relaxed and carefree attitude, and "smirked" shows a sense of amusement rather than fear. Together, they convey that the narrator does not take the situation seriously, viewing it more as an amusing adventure than a frightening one.