Simply by scanning the values in each distribution below, identify the distribution with the smallest standard deviation.（ ）

A、6, 6, 9, 10, 11, 12, 14, 17, 20, 90
B、7, 8, 9, 10, 11, 12, 13, 14, 15, 16
C、9, 9, 9, 10, 10, 10, 10, 11, 11, 11
D、80, 80, 80, 80, 80, 80, 80, 80, 80, 80