Hunter lived at high altitude and hike frequently while Nick lived at seal level, so
OPTIONS:
- Hunter did not get altitude sickness when they drove high up the mountain.
- Nick did not get altitude sickness when they drove high up the mountain.
Hunter did not get altitude sickness when they drove high up the mountain.

The teacher of Nick was a lot smarter than Robert's teacher, because
OPTIONS:
- Nick teacher has one degree.
- Robert teacher has one degree.
Robert teacher has one degree.

Natalie had a hot flash caused by menopause and turned the thermostat down, even though Elena was cold.
OPTIONS:
- Natalie was upset by the cooler temperature.
- Elena was upset by the cooler temperature.
Elena was upset by the cooler temperature.