Definition: In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.
Input: Question: How long was the reign of the person who claimed all the land of England at the Norman conquest of England? Passage:At the Norman conquest of England, all the land of England was claimed as the personal possession of William the Conqueror under allodial title. The monarch thus became the sole "owner" of all the land in the kingdom, a position which persists to the present day. He then granted it out to his favoured followers, who thereby became tenants-in-chief, under various contracts of feudal land tenure. Such tenures, even the highest one of "feudal barony", never conferred ownership of land but merely ownership of rights over it, that is to say ownership of an estate in land. Such persons are therefore correctly termed "land-holders" or "tenants" (from Latin teneo to hold), not owners. If held freely, that is to say by freehold, such holdings were heritable by the holder's legal heir. On the payment of a premium termed feudal relief to the treasury, such heir was entitled to demand re-enfeoffment by the king with the fee concerned.
Links: a. Allodial title b. Freehold (law) c. William the Conqueror d. Estate in land
Output:
c