Correct answer is: C. The lowest-level vassal in a feudal system.
Under Feudalism, there was a peasant status called Serfdom. Serfs were bound and tied to the land, if sold they came with it. It was not slavery itself, but under the feudalism they were definitely the lowest form of "tenant" of the land.
John W. Mackay and George Hearst had interests in owning mines in common.
Hope this helps,
Davinia.
Based on my information, I believe that the higher authorities that would choose the prime ministers would actually be the "house of commons". Going back a few years, many of the "house of commons" actually did not have the responsibility in order to do this, but then, the government figured that it would be better if they were to handle on this responsibility.