Final answer:
The growing acceptance of divorce in the United States is attributed to less restrictive divorce laws, greater economic independence for women, and a decreased stigma about divorce, not an increased stigma. option b.
Step-by-step explanation:
The option that has NOT contributed to the growing acceptance of divorce in the United States is b. Increased stigma about divorce. In contrast, other factors have indeed contributed to the acceptance of divorce, such as less restrictive divorce laws, greater economic independence for women, and a decreased stigma about divorce. Societal changes have reflected more liberal attitudes towards divorce, with factors like the liberalization of divorce laws in the 1960s and increased participation of women in the workforce being significant contributors. Moreover, with an increase in the median age of marriage and higher education levels among those marrying, marital stability has been promoted.