Which of the following sets of measurements is the MOST precise?
OA) 1 m, 2 m, 3 m, 4 m
OB) 2.9 m, 3.0 m, 3.1 m, 3.2 m
OC) 10 m, 20 m, 30 m, 40 m
OD 100 m 200 m 300 m 400 m