Critics, though, say it isn’t nearly bold enough.The park’s board on Monday voted — unanimously, but with one abstention, according to its chairman — to add an exhibit to an existing museum that will tell “the whole story” of the monument — a giant carving of Confederate leaders on horseback — including the history of the Ku Klux Klan on the mountain and its rebirth there in 1915, among other things.”We took the appropriate actions, and it’s the boldest step