A sentence fragment...
It does not sound right, therefore it is not complete (fragment). Run-on sentences are complete, yet they are extended to much.
C sending harassing emails
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).
Jonathan Swift uses A. optimistic to F. to remind people of their childhood. The fact that he doesn't have any children made him eligible from his proposal.