Respuesta :
A; increased group size reduces perceived individual responsibility.
People become influenced by the Bystander Affect (for a real life historic example, consider the murder of Kitty Genovise)
People become influenced by the Bystander Affect (for a real life historic example, consider the murder of Kitty Genovise)
Considering that it can't be B because a bigger group increases the sense of a collective, it can't be C because no change is highly unlikely if not impossible, and it can't be D because someone always takes the responsibility considering that any group has some sort of leadership or organization, we can conclude that it is A. Increased group size reduces perceived individual responsibility.
A good way to understand it better is reading about the bystander apathy which somewhat explains this behavior.