Complex sentence: The research concluded that the subjects believed that the physically attractive individuals have more socially desirable traits, which will then lead the individuals to have more success in an occupation, marriage, being a parent, and happiness in life rather than the less-attractive persons.
Split into simpler sentences: The research concluded that the subjects believed that the physical attractive individuals have more socially desirable traits. Which will then lead the individuals to have more success in an occupation, marriage, being a parent, and happiness in life rather than the lesser attractive persons.