The fundamental ambiguity at the heart of psychological egoism involves the question whether we act selfishly in our own self-interest. Therefore, the option B holds true.
The concept of psychological egoism can be referred to or considered as the concept wherein the ego situated in the very nature of an individual is expressively analyzed. It also expresses about the self-interest that an individual seeks at all times as a part of the fundamental ambiguity under this concept of psychological egoism.
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