The median age of first marriage has in the last fifty years.
increased for men but not women
decreased for men but not women
increased for both men and women
decreased for both men and women

C, increased for both men and women

Explanation:

According to the Census Bureau, the average age for first marriage in 2017 was 27,4 for women and 29,5 for men.

This is the longest time for people in the United States to wait to get married.

This increase is due to many factors, some of them are: change in peoples' values and beliefs systems (people question the whole idea of getting married), economic difficulties ( difficulties in finding a job that provides for having a family), rise in unmarried people living together, and the change in society regarding aging ( what was considered old age before is middle age now).

chalk is insoluble in water