Answer:
I think no 2 is the answer
Answer:
hertz
Explanation:
Usually frequency is measured in the hertz unit, named in honor of the 19th-century German physicist Heinrich Rudolf Hertz. The hertz measurement, abbreviated Hz, is the number of waves that pass by per second. For example, an "A" note on a violin string vibrates at about 440 Hz (440 vibrations per second).
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C. Education beyond high school versus education beyond college because in the other examples you can't really use those topics because there isn't really much about them, but in example C. you can tell the two similarities in both the high school and college, and you could put there differences. Hope I helped!
Low individualism that’s my answer might not be right
