Researchers have found that couples who are happy in their marriages make very different attributions for their partners' behaviors than couples who are unhappy. specifically, couples in happy marriages make while couples in unhappy marriages make

You didn't list the options to choose from but I found them elsewhere.

The answer is - couples in happy marriages make external attributions for negative behavior and internal attributions for positive behavior; while couples in unhappy marriages make internal attributions for negative behavior and external for positive. Happy couples blame outside forces for issues whereas unhappy couples blame each other.

i disagree that there is little difference between adult female development and adult male development. sociological studies comparing female and male pathways to adulthood, revelead that there are sustancial differences between them. particularly, female and male differ from timing of marriage, when they began to live with children and the likelihood of combining wife/husband and parent roles.