Freddie is carrying out an experiment for which he has to maintain a water bath at a temperature of 37°C. He has a choice of four thermometers, all of which read from 0 to 100°C.Thermometer A is marked in 5°C intervals, B in 1°C intervals, C in 10°C intervals and D in 20°C intervals. Which thermometer should Freddie choose to monitor the water bath's temperature?

B

D

A

C