Alessandro Wanted to Help the Victims of the Recent Earthquake

Alessandro wanted to help the victims of the recent earthquake in Italy.He anonymously established a fund to help the families of the victims.Even inside the banks no one knew who had done this.Alessandro did this without any desire for external or internal rewards.This is an example of

A) pure altruism.
B) intrinsic motivation.
C) extrinsic motivation.
D) philanthropic justification.