How does Einstein's support for peace after the Second World War expand his scientific identity?

Correct answer: He becomes a global moral thinker from a discoverer

The governing concept is the expansion of public identity. Einstein remains a scientist, but his experience of war and the destructive potential of modern weapons leads him to speak publicly about peace and human responsibility. His scientific authority gives weight to that intervention, while his concern for humanity shows that he is thinking beyond laboratory results. Option A is correct because it describes a movement from scientific discoverer to globally engaged moral thinker without erasing his original identity. Option B is the opposite of the evidence: peace advocacy does not make him a soldier. Options C and D invent careers and identities unrelated to the episode. The question therefore asks readers to recognise continuity plus development—his science remains important, but his public role broadens into ethical reflection and international concern.