St. Croix and St. John are two of the three main U.S. Virgin Islands. What is the third?

Along with Bach and Beethoven, which composer completes the "Three B's" of classical music? Besides the United States and Guatemala, which country borders Mexico? Neptunium and plutonium are two of the three elements named after planets. What is the third? Along with crocodiles and alligators, which long-snouted reptiles make up the third family of the order Crocodylia? Which of these men was one of Noah's three sons who were aboard the ark? In September 1994, Jimmy Carter, Senator Sam Nunn and which retired general went to Haiti to negotiate a settlement wit… In the music licensing group ASCAP, what does the "C" stand for? Which 17-year-old rock star died on February 3, 1959, in the plane crash that also killed Buddy Holly and the Big Boppe…