Which of These High Density Situations Would Be LEAST Likely

Which of these high density situations would be LEAST likely to be considered crowded?

A) Over 3,000 people are sitting on blankets on a hillside watching the laser show at Stone Mountain, Georgia.
B) Ten people are in an elevator riding up 50 floors.
C) There are ten patients to each ward in a mental hospital.
D) Three co-eds share one dorm room and one bathroom.