Which of the following is the least accurate definition of the term sooner?

A “sooner” was someone who entered the Unassigned Lands or staked a claim before the official start of the 1889 Land Run, gaining an unfair advantage. Choices A, C, and D describe that early entry or claim. Choice B merely describes an Oklahoman who owned land after the territory was created, which does not define a sooner.

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