"Effect of School Pregnancy-Prevention Clinics on Students' Attitudes Toward Contraception

"Effect of school pregnancy-prevention clinics on students' attitudes toward contraception." A testable hypothesis is:

A) Schools have effects on students' attitudes.
B) Students' attitudes affect whether or not a school has a pregnancy-prevention clinic.
C) There are schools where students lack pregnancy-prevention clinics.
D) None of these hypotheses (a, b, c) is testable as stated.