Why Does a Good Relationship Increase Health and Longevity

Multiple Choice

Why does a good relationship increase health and longevity?

A) Because healthy people tend to partner with happy people which makes them happy as well.
B) Good relationships provide practical and emotional support which in turns improves health.
C) Because it increases the likelihood of having sex which is good for health.
D) There is no evidence that a good relationship increases health and longevity, it is merely a coincidence.