Answer:
A. Thomas Edison, Micheal Faraday, and Henry Bessemer
Explanation:
A monarch is a religious head of state, and a king is a male monarch who rules a country.
The main thing that the AEF, doughboys, and harlem hellfighters (369th regiment), have all in common is that they were part of the "American Expeditionary Forces," who were sent to Europe in 1917.
It is B, i know much about this