If students can major either in Humanities or Sciences, which fact establishes that the observation "a student is male" is independent from the observation "a student is a Science major"? A. As many males major in Humanities as in Sciences.

B. As many males as females major in Sciences.

C. Males constitute the same fraction of students majoring in Humanities as in Sciences.

D. The fraction of males among the students majoring in Humanities is equal to the fraction of females among the students majoring in Sciences.