Lesley, a sociology major, believes that money is the key to happiness. her friend stephen, a psychology major, believes that good health is the key to happiness. how might the two friends resolve their disagreement using the best available research results?

One way to resolve the disagreement is: They could research peer-reviewed articles to see if either perspective is supported.
 peer-reviewed articles are types of articles that already evaluated by another expert in the similar field.
Which means that these articles represent the closest thing to the general truth that accepted in that field.