Which characteristic of Postmodern writing is most clearly shown in the two works of Tim O'Brien?
A. They are written in a matter-of-fact way.
B. They explore rich imagery.
C. They involve elements of violence.
D. They are written in a fragmented way.

The right answer is "D. They are written in a fragmented way."

O'brien often wrote in a fragmented way, which was common in postmodern writers.

In his work, War in Vietnam, the fragmented narrative that tells the story brings a feeling that the memory of O'brien is also fragmented and this approaches the reader and the writer, makes the reader understand the fragmentation of memories in the face of a war .