The correct answer is B) unstressed STRESSED, unstressed STRESSED, unstressed STRESSED, unstressed STRESSED. It emphasizes the dreariness of life.
This rhyme scheme is aabba which means that the word "dreary" from the beginning of the stanza rhymes back with itself in the end of the stanza which emphasizes the cyclical, dreary nature of life though the means of using this meter. In other words, the dreariness cannot be escaped.