Among the following four groups, the ones that can't form the proportion are () a, 3, 4, 6, 8b, 5, 2, 0.1, 100C, 6, 8, 9 and 10 D. 1 / 6, 1 / 7, 0.6, 0.7

Among the following four groups, the ones that can't form the proportion are () a, 3, 4, 6, 8b, 5, 2, 0.1, 100C, 6, 8, 9 and 10 D. 1 / 6, 1 / 7, 0.6, 0.7

C. Six, eight, nine, ten can't