Final answer:
The correct answer is c. 17, based on sociological studies and national surveys that track sexual behavior and attitudes among American teenagers.
Step-by-step explanation:
Most American teenagers have sexual intercourse for the first time at about age c. 17. This reflects broader sexual attitudes and behaviors among U.S. teens which often deviate from what might be idealized. Sociological studies and national surveys play crucial roles in understanding these patterns of sexual activity, as well as the types of sex education that are most supported and effective.
In the United States, there has been a tendency for states to vary in their approach to sex education, with some offering comprehensive programs and others focusing solely on abstinence. Data indicates that comprehensive sex education might be associated with more positive sexual health outcomes, such as lower rates of teenage pregnancy compared to areas where such education is not as prevalent. Notably, U.S. attitudes towards sex are generally more conservative compared to other Western countries.