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

Jika K = {x | 5 <= x <= 9, x bilangan asli} dan L = {x | 7 <= x <= 13, x bilangan cacah}. K n 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}