A researcher observes that, on average, the number of divorces in cities with major league baseball teams is larger than in cities without major league baseball teams. The most plausible explanation for this observed association is .

Association is due to the presence of a lurking variable (Major League Baseball teams tend to be in large cities with more people, hence a greater number of divorces)  

Explanation:

A breakdown of a family or a relationship is a major stressful event in life. It is also a bitter truth that one out of three gets divorced. This is the major topic of research now these days. There are many studies has been conducted on this topic of divorce.

There is a new study from the center that focuses on the relationship between peoples or divorce. The major baseball league team focuses on its major implications. Around 90% of people are not satisfied with their relationship when they have the first baby. Many studies tell that major league baseball teams in major cities reduce the cases of divorce in the cities.