Which Action Demonstrates Altruistic Behavior

Which action demonstrates altruistic behavior?

A) setting up a scholarship fund for your children for the tax deductions
B) helping your neighbor cut down a tree, so that the leaves don't blow into your yard anymore
C) accidentally scaring a bank robber away by screaming when you see her
D) informing the Environmental Protection Agency that your company is dumping toxic waste into a local river, even though it will jeopardize your job