Jika K= {x|5 <= x <= 9,x bilangan asli} dan L= (x|7 <= x <

Jika K= {x|5 <= x <= 9,x bilangan asli} dan L= (x|7 <= x < 13,x bilangan cacah} K u L= ... A. {5,6,7,8,9,10,11,12,13} B. {5,6,7,8,9,10,11,12} C. {6,7,8,9,10} D. {7,8,9,10}