What painter, born in 1887, was called "the mother of American Modernism"?

What comic book hero's first arch-nemesis was the Ultra-Humanite?

What director is alleged to have faked the Apollo moon landings and left clues in his 1980 psychological horror film?

In what year did the following events take place?  The first observance of a federal holiday for Martin Luther King Jr.'s Birthday, the return of Sigourney Weaver as Ellen Ripley, Diego Maradona's "Hand of God" World Cup goal, and the first episode of the Oprah Winfrey Show.