<p>Let's analyze the sentence:<br></p><p><strong>The employees (____ intend to undergo an interview for transfer) have to apply today.</strong></p><p dir="ltr"><span>The part wrapped with "()" is an adjective clause.</span></p><p><span>Let’s focus on the adjective clause “_______ intend to undergo an interview for transfer.”</span></p><p><span>The blank should be filled with a relative pronoun that acts as the subject of this adjective clause to modify the antecedent “The employees”, a group of people. Choice (D) "</span><span>who"</span><span> is the correct answer. </span></p><p dir="ltr"><span><span>(C) </span><span>where - This</span><span> is incorrect because “where” can be used as a relative adverb, which equals a preposition and a relative pronoun that modifies a place, not a relative pronoun to be used as the subject of an adjective clause. </span></span></p><p dir="ltr"><span><span>(B) </span><span>when - This</span><span> is incorrect in a similar way. The word “when” can be used as a relative adverb, which equals a preposition and a relative pronoun that modifies a time, not a relative pronoun to be used as the subject of an adjective clause. </span></span></p><p dir="ltr"><span><span>(C) </span><span>whose - This</span><span> is incorrect because “whose” is a possessive relative pronoun, which can’t be used as a subject of an adjective clause, either. </span></span></p>