Answer:
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<span>It is letter B. Primary sources are direct records of a subject while auxiliary sources are any record of something that isn't an essential source. Distributed research, daily paper articles, and other media are normal optional sources. Secondary sources can, nonetheless, refer to both essential sources and auxiliary sources.</span>
Your answer would be A. point of view.
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Who just finished the marathon is tired is the subordinate clause, because it started with a relative pronoun, it is classified as a relative clause. "Just" is the subordinate conjunction and it is an adverb because it modifies the "finished" in the sentence to show immediacy.
