Three liquid-in-glass thermometers are available.
Thermometer I: least count 0.5 °C
Thermometer II: least count 0.2 °C
Thermometer III: least count 0.1 °C
You need to measure a temperature rise of roughly 15 °C with a percentage uncertainty less than 1.0 %. Which thermometer should you choose? Show a brief calculation to justify your answer.