Two years ago, the nurse assessed the health needs of high school students and determined that student pregnancy was a priority problem. The nurse then developed a pregnancy prevention program for the entire school district. Which finding is the best indicator of the program's effectiveness?

C Students requesting information about adolescent pregnancy has increased by 25%. B Students report an average delay of 2 years for their first sexual experience. A 80% of the students attend a voluntary sex education seminar. D 75% of the parents agree to support a pregnancy prevention program in the schools.