The correct answer is: D. notable

A notable person is one who is well-known and respected for their achievements or qualities. In this case, the merchant is renowned for his simple way of living, which suggests that he is a person of high moral character.

The other options are incorrect because:

  • A. notorious means well-known for something bad or evil.
  • B. famous means well-known throughout a country or the world.
  • C. unknown means not known by many people.

I hope this helps! Let me know if you have any other questions.