Education is essentially an investment which, like other investments, should be capable of yielding some profits over time, according to?

Education is essentially an investment which, like other investments, should be capable of yielding some profits over time, according to?
(a) Social demand approach
(b) Manpower approach
(c) Rate of return approach
(d) All of the above
✅ Correct answer: (c) Rate of return approach
Explanation: The rate of return approach views education as an economic investment that increases productivity and income.