F. Scott Fitzgerald's work primarily conveys that the postwar world was empty and meaningless. His characters pursue wealth and adventure but ultimately experience disillusionment and loneliness. Through works like 'The Great Gatsby', he critiques the superficial nature of the 1920s American Dream. ;
F. Scott Fitzgerald's work reflects the theme that the postwar world was empty and meaningless, particularly illustrated in 'The Great Gatsby'. His characters, despite their wealth and extravagance, experience profound disillusionment and loneliness. Therefore, the best answer is option D.
;