Four individuals, A, B, C, and D are part of the same popula…

Four individuals, A, B, C, and D are part of the same population. A begs for food from B. B shares with A. A later begs for food from C. C does not share with A.  Individuals in this population show reciprocal altruism. Which of the following could be predicted based on the principles of reciprocal altruism?