Which genre of science fiction best describes the story "Report on the Barnhouse Effect" by Kurt Vonnegut?

A. adventure sci-fi

B. hard sci-fi

C. gadget sci-fi

D. social sci-fi

The correct answer among the choices provided is option D. The genre of science fiction best describes the story is social sci-fi. Main theme of the story is war versus peace. Some social issues were also shown in the story.