Explanation:

- B. A man went away from his home.

- Sets the scene by introducing the subject and action.

- D. One day he wrote a letter to his family, but could not find any one to take the letter to his town.

- Develops the problem; explains his challenge of sending a letter.

- C. Disappointed, he decided to take it himself.

- Shows his resolution to the problem introduced in the previous sentence.

- A. When he reached his town, he went to his house and knocked at the door.

- Concludes the journey with the man arriving at his destination.

Option 2: BDCA is the correct order. Everything unfolds logically, with the man leaving, facing a mail issue, deciding to deliver the letter himself, and finally arriving home.

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