Which is correct? after the customers ate; the leftover food was thrown away or after the customers ate, the leftover food was thrown away

in the story "marionettes inc," in the last line of the story, braling two is referred to by the narrator as the "someone." what does this new identifier imply and how does it add to the drama of the closing scene?

answer is b,

"the tracer looks harmless in flight, but the pilot’s bitten lips and white knuckles suggest how dangerous it can be."

it was correct.