Answer:
d. They could research peer-reviewed articles to see if either perspective is supported.
Step-by-step explanation:
It is given in the question that both the students of sociology major, Lesley and Stephen, have two different views on happiness. One claims that money is important for happiness while the other says that good health is important to be happy in life.
Therefore both Stephen and Lesley should research and do a study on each other's articles and see if the either perspective view is well supported or not. In this way, the can come to a conclusion.
Hence the correct option is (d).