b) Superman in Action Comics #1

Superman, first appearing in Action Comics #1 in 1938, was the first American superhero comic, introducing a new era in comic books. Created by Jerry Siegel and Joe Shuster, Superman quickly became an icon and paved the way for the superhero genre in American comics. His character set the standard for what a superhero could be, with extraordinary powers and a strong moral code. The launch of Superman revolutionized the comic book industry and had a profound impact on American culture and entertainment.