In Levine's Study of Large Cities in 23 Nations, What

Multiple Choice

In Levine's study of large cities in 23 nations, what did the research assistant do to give people an opportunity to either help or not help?

A) The assistant dropped a pen while walking in the city center.
B) The assistant wore a leg brace, dropped a pile of magazines, and struggled to pick them up.
C) The assistant wore dark glasses and carried a cane, pretending to be a blind person who needed help to cross the street.
D) all of the above