Final answer:
The rate of births by C-section in the United States has been steadily increasing since 1996.
Step-by-step explanation:
In the United States, the trend for the rate of births by cesarean section (C-section) has been steadily increasing since 1996.
According to data from the Centers for Disease Control and Prevention (CDC), the C-section rate in the U.S. was around 21% in 1996 and has gradually risen to over 30% in recent years.
This increase may be attributed to various factors including medical advancements, changes in obstetric practices, and maternal preferences.