Laura Duberstein Lindberg, Freya L. Sonenstein, Leighton Ku, and Gladys Martinez

Recent studies have suggested that relationships between adult males and teenage girls account for about two-thirds of adolescent pregnancies. However, these men are usually less than five years older than the mother, which may show that the relationships are consensual. In the following viewpoint, Laura Duberstein Lindberg, Freya L. Sonenstein, Leighton Ku, and Gladys Martinez contend that while adult men father some adolescent pregnancies, most teenage parents are closer in age than previously thought. Lindberg and Martinez are research associates, Ku is a senior research associate, and Sonenstein is the director, all at the Urban Institute, a nonpartisan economic and social policy research organization.

As you read, consider the following questions:

1. According to the authors, which group of girls was most likely to have...