The Board of Education ... of Pottawatomie v. Earls case dealt with drug testing for public school students in competitive extracurricular activities, including music and clubs (like chess) as well as athletics. How did the court balance the privacy interests of the students with the legitimate school objectives?
a) By completely disregarding the privacy interests of the students
b) By implementing random drug testing for all students regardless of their involvement in extracurricular activities
c) By conducting drug testing only for students involved in athletics, excluding other extracurricular activities
d) By limiting drug testing to students involved in competitive extracurricular activities and implementing safeguards to protect their privacy