Evelyn turned the thermostat up from 68 degrees to 70 degrees; however, she doesn't think it feels any warmer and she wants to turn it up even higher. Her roommate thinks that it is now too hot, and she wants to turn the thermostat back down.
Apparently Evelyn has

A. a smaller just noticeable difference for temperature than her roommate does
B. a lower absolute threshold for temperature than her roommate does
C. a larger just noticeable difference for temperature than her roommate does
D. a higher absolute threshold for temperature, compared to her roommate does

The thermostat was turned up from 68 to 70. This means there was an absolute rise in room temperature. Evelyn didn't notice any change, however, while her roommate was able to feel a change in room temperature as small as two degrees. This means that while her roommate can detect a just noticeable difference for temperature, Evelyn has a smaller just noticeable difference for temperature than her roommate.