found that men and women go through the same stages of adult development, differ in terms of their social roles and identities, and deal with the developmental tasks in each stage differently.

Daniel Levinson            

Explanation:

Daniel Levinson was a psychologist, who proposed a theory on social development according to which people go through different stages along their life span by dealing with different tasks in each stage.

Levinson theory is called "season’s of a man’s life", in order to come up with his theory he interviewed different men from different ages and he came to the conclusion that they all went through the same stages of adult development. However, he stressed the fact that, women went through these stages in a different way and, although they went through the same general stages, women dealt with them in a different way and that gender and social roles would play a role in the way how men and women go through these stages.

Therefore, we could say that Daniel Levinson found that men and women go through the same stages of adult development, differ in terms of their social roles and identities, and deal with the developmental tasks in each stage differently.

i got 3,4 and 5 as an answer

i would say b. research typically uses a variety of sources