Four Students Took Three Measurements Each of the Distance Between

Multiple Choice

Four students took three measurements each of the distance between the chemistry building and the cafeteria on campus.Each person used a different measuring device and therefore arrived at a different set of measurements.Which person is MOST precise? ​
Student A - counted steps
Student B - measured with a tape measure
Student C - used a radar measuring device
Student D - walked with a measuring wheel
155 m
157 m
158 m
153 m
160 m
152 m
152 m
151 m
180 m
155 m
149 m
153 m
​

A) Student A
B) Student B
C) Student C
D) Student D
E) All are equally precise.