The answer is A: God or self.
Explanation for each option:
A. God or self - This is the correct answer. According to Augustine, a person will ultimately love either God or themselves. Augustine's philosophy often contrasts the love of God (caritas) with the love of self (cupiditas), emphasizing that true fulfillment and moral goodness come from loving God above all else.
B. God or earth - This option is incorrect. While Augustine does discuss the material world, he does not frame the primary choice of love as between God and the earth.
C. God or happiness - This option is incorrect. Augustine believes that true happiness is found in the love of God, so he would not contrast God with happiness as separate objects of love.
D. God or humana-abnegation - This option is incorrect. Augustine does not use the term "humana-abnegation" in his discussions of love. His focus is more on the dichotomy between the love of God and the love of self.
In summary, Augustine's teachings emphasize that a person's ultimate love will be directed either towards God or towards themselves, making option A the correct answer.