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) Approximately one million people were in Time Square in New York City for the New Year's Eve celebration.
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 coeds share one dorm room and one bathroom.