Final answer:
All the options provided (changing societal norms, increased financial independence of women, lack of commitment in marriages, decreased social stigma around divorce) are reasons for the increase in divorce rates, making it a trick question as they have all contributed to why divorces are more prevalent now compared to in the past.
Step-by-step explanation:
The question seeks to understand which of the provided options is not a reason that divorce rates have risen over the last few decades.
When looking at the provided options:
1) Changing societal norms, 2) Increased financial independence of women, 3) Lack of commitment in marriages, and 4) Decreased social stigma around divorce, it's important to note that all these factors have indeed contributed to higher divorce rates.
Therefore, it is a bit of a trick question because all of the options are established reasons for why divorce rates have increased. Societal norms have shifted to be more accepting of divorce, financial independence gives women more autonomy, lack of commitment reflects modern attitudes towards marriage, and a decreased social stigma makes it more socially acceptable to end a marriage.