<p>Because the data he used came from a <strong>reliable</strong> source, Mr. Smith was certain that his analysis would arrive at a correct conclusion.</p><div><span style="font-size: 13.008px;">The sentence requires an adjective to describe the source of the data. Among the given options, the adjective form that correctly describes the source is "reliable." </span></div><div><span style="font-size: 13.008px;"><br></span></div><div><span style="font-size: 13.008px;">(A) "Reliably" is an adverb and cannot modify the noun "source." It does not fit grammatically or contextually.</span></div><div><span style="font-size: 13.008px;">(B) "Reliable" is the correct adjective form that describes the source of the data. It fits both grammatically and contextually.</span></div><div><span style="font-size: 13.008px;">(C) "Relying" is a verb form and does not fit grammatically. It would require a subject and an object to make a complete sentence.
(D) "Reliance" is a noun and does not fit grammatically. It does not modify the noun "source" as required in the sentence. </span></div><div><span style="font-size: 13.008px;"><br></span></div><div><span style="font-size: 13.008px;">Therefore, the correct answer is (B) reliable.</span><br></div>