Without Going Beyond the Information Provided, Which of the Following

Without going beyond the information provided, which of the following actions by Abe is the clearest example of egoism?

A) Abe spends time helping his friend study for an exam because he wants his friend to succeed.
B) Abe acts as a peer tutor because it will look good on his resume.
C) Abe buys canned goods and then donates them to the local food bank.
D) Abe anonymously donates money to a local children's charity.