In Terms of Willingness to Help a Stranger,many Studies Have

In terms of willingness to help a stranger,many studies have confirmed that:

A) the smaller the group of bystanders,the less likely any individual is to offer help.
B) when individuals are alone,they are least likely to offer help.
C) the larger the group of bystanders,the less likely any individual is to offer help.
D) the number of bystanders has little to do with an individual's willingness to help.