Compare and interpret the measures to select the data with the least variation.

A. Dataset C has a standard deviation of 1.2 and a mean of 25.
B. Dataset D has a standard deviation of 1.14 and a mean of 48.
C. Dataset A has a standard deviation of 1.9 and a mean of 21.
D. Dataset B has a standard deviation of 1.41 and a mean of 29.

To select the dataset with the least variation, we should look for the dataset with the smallest standard deviation.

Comparing the standard deviations:
A. 1.2
B. 1.14
C. 1.9
D. 1.41

Dataset B has the smallest standard deviation of 1.14, indicating the least variation in the data.

Therefore, Dataset B would be the best choice for selecting the data with the least variation.