According to a study reported in the text, in 2009 about ____ of 9th graders in the United States reported that they had engaged in sexual intercourse and about ____ of 12th graders reported they had engaged in sexual intercourse.
A) one-third; two-thirds
B) 25%; 50%
C) one-half; three-quarters
D) one-half; 90%

Question

Quizplus · Accepted Answer

The study reported that about one-third of 9th graders and two-thirds of 12th graders in the United States had engaged in sexual intercourse in 2009.

According to a Study Reported in the Text, in 2009