JAMB Use of English 1978 Question 100

Choose the option which is nearest in meaning to the sentence: For all he cared, his parents might have been dead for years

1. A.although concerned about his parents, he had been unable to find out if they were alive
2. B.He cared for no-one except his parents and it was possible that they had died long before
3. C.He did not care whether his parents were alive or had died long before
4. D.He was concerned about every one, not just about his parents, who might have died long before
5. E.He cared very much for his parents even though they were dead.