Final answer:
Low levels of conflict with in-laws among newlyweds can predict marital happiness. Research has shown that maintaining positive relationships with family members contributes to a state of well-being in adulthood.
Step-by-step explanation:
Low levels of conflict with in-laws among newlyweds can predict marital happiness. When there is minimal conflict between a spouse and their in-laws, it indicates a positive dynamic and better overall satisfaction in the marriage. Research has shown that maintaining positive relationships with significant others, including family members, contributes to a state of well-being in adulthood. Therefore, low levels of conflict with in-laws can be a positive factor in predicting marital happiness.