According to George Vaillant's longitudinal studies, in middle-age was more strongly related than to whether individuals would have an enduring and happy marriage at 75 to 80 years of age.'

The correct answer is generativity; intimacy

George Vaillant, brought several new analyzes on human behavior and psychology. Bradt highlights two specific points in the study: "Happiness is love" and "if alcoholism is not the root of all evil, it is closely related to unhappiness".

Bradt says he could define the 'secret of happiness' with three attitudes: Being able to do what you love, being close to friends or simply being healthy psychologically, financially or emotionally.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.