Who propounded the 'Eight-Fold Path' for the end of misery of mankind?

Answer: Option B

The idea of the Eightfold Path appears in what is regarded as the first sermon of the founder of Buddhism, Siddhartha Gautama, known as the Buddha, which he delivered after his enlightenment. There he sets forth a middle way, the Eightfold Path, between the extremes of asceticism and sensual indulgence. These Are,
1. Right View
2. Right Resolve
3. Right Speech
4. Right Conduct
5. Right Livelihood
6. Right effort
7. Right Mindfulness
8. Right Samadhi
This eight-fold path leads to 'Nirvana'.