"Breaking up is hard to do," but on January 1, 1984, which telecommunications giant was forced to break up?

"Breaker, breaker" - which song by C.W. McCall topped the charts in early 1976? Which breakfast food's name can also be used as a verb meaning "to flatten completely"? Which country entered World War I in April 1917, helping break the long stalemate on the Western Front? Breaking a long tradition of neutrality, Denmark became a founding member of which military alliance in 1949? What word describes how a dog breathes heavily with its mouth open after a run? Which author wrote the Uncle Remus tales, in which Brer Rabbit says he was "bred en bawn in a brier patch"? Bred in captivity, which rare masked member of the weasel family was reintroduced into the Wyoming wild in 1991? Bred in Scotland in the 1960s, the Scottish Fold cat has which body parts folded forward?