Which of the Following Is an Example of an Altruistic

Which of the following is an example of an altruistic behavior?

A) accidentally scaring a bank robber away by screaming when you see him or her
B) telling the police that your company dumps toxic waste,even though you will lose your job
C) setting up a scholarship fund for your children because you will receive tax deductions
D) helping your neighbor cut down a tree,so that the leaves do not blow into your yard anymore