Answer:b) based on determining long-term beneficial consequences
Explanation:In philosophy, egoism is the theory that is focused on self and what drives one's action.
Egoism has two variants, descriptive or normative. The descriptive (or positive) variant deals with human affairs. This variant describes that people are driven by perosnal interest and desires. The normative variant suggest that people are somehow motivated irrespective of what drives them. Ethical egoism is based on pursuing what is beneficial in one's life for a long term and what will be of benefits in their lives in a long run.