Honestly, I know that it is either A. or D. I would most likely go with D.
Answer:
<u>College Head Quits Criticizing Governor</u>
Explanation:
Even though it's much more longer, it's more precise than the other ones and if it was the other ones alone, people would see it differently.
Also hi from last answer! :)
It would be the last one, as Ology is used in many "studies."
ex. Biology, Dermatology, Technology, Angelology.