to devote a certain percentage of hours worked to earning. .

[Vincen]

The government has no right to tax earnings from labor. Taxation of this kind requires the laborer to devote a certain percentage of hours worked to earning money for the government. Thus, such taxation forces the laborer to work, in part, for another's purpose. Since involuntary servitude can be defined as forced work for another's purpose, just as involuntary servitude is pernicious, so is taxing earnings from labor.

The argument uses which one of the following argumentative techniques?

(A) deriving a general principle about the rights of individuals from a judgment concerning the obligations of governments

(B) inferring what will be time case merely from a description of what once was the case

(C) inferring that since two institutions are similar in one respect they are similar in another respect

(D) citing the authority of an economic theory in order to justify a moral principle

(E) presupposing the inevitability of a hierarchical class system in order to oppose a given economic practice

The OA is C.

I though the right option should be B. Why is C?