A teacher divides her class into groups and assigns each

group the task of measuring the mass of the same object

three times. The teacher already knows that the mass of

the object is 25 g.

Based on the results each group records, which group makes the most

precise measurements of the object?

O


A. Group C: 32.1 g, 35.0 g, 25.0 g

O


B. Group B: 25.5 g, 25.0 g, 24.8 g
O

C. Group A: 28.5g, 28.4 g, 28.5 g


O D. Group D: 20.0 g, 25.0 g, 30.09