Which sentences in this excerpt from Ernest Hemingway's "In Another Country" reflect the theme of the psychological alienation caused by war?

How can you tell that the text is from a biography

In a group discussion, which statement most clearly uses evidence to support a conclusion? a) the author makes some good points, but i feel that he’s ultimately biased. b) the author proves that he’s biased when he uses terms like “silly” and “stupid”. c) the author obviously hates the way fast food tastes, which is why he’s negative. d) the author first criticizes fast food, and then goes in to criticize junk food.

Which is these is an example of circular reasoning