14. A student measured the air temperature at a particular location every
three hours for one day. He made a bar graph to organize his findings. The
student then compared his findings with the information he obtained from
a nearby weather station. He found that the weather station's
measurements were three degrees warmer at each three-hour interval
than the measurements he had taken. What is a likely explanation for the
difference?

A-weather stations do not use the most precise tools
B-the student's thermometer was calibrated incorrectly.
C- the student made a mistake in recording two temperature readings
D-both the student and the weather station reported incorrect temperature