What evidence does seligman provide to support his claim that psychology can be used to improve the happiness of the average person

autobiography of an ex-colored man is told from the first-person point of view of an unnamed male narrator. he starts his tale by stating that he is going to reveal the great secret of his life. he first takes the reader to his childhood in georgia where he was raised by a single mother. he was dissapointed in his own color.

did you ever get an answer? i'm on the same question : (

d is the best answer for this question.

i don't see any right answer. i don't know english and only math