<span id="docs-internal-guid-8499d89d-7fff-5e37-351b-d6bdbbc0bbde"><p>Let's analyze the sentence:<br></p><p><strong style="font-weight: 600;">Kaplan, Inc (____ in offering customized intensive courses) is widely recognized for helping students achieve the best exam results possible.</strong></p><p dir="ltr"><span>The part wrapped with "()" is an adjective clause.</span></p><p dir="ltr">What is missing here is the relative pronoun "which" and the verb "specializes". So, the sentence becomes:</p><p dir="ltr"><strong style="font-weight: 600;">Kaplan, Inc (which specializes in offering customized intensive courses) is widely recognized for helping students achieve the best exam results possible.</strong><br></p><p dir="ltr">The adjective clause “<span style="font-weight: 600;">which specializes in offering customized intensive courses</span>” modifies the antecedent “<span style="font-weight: 600;">Kaplan, Inc</span>.” </p><p dir="ltr">Here, the relative pronoun “which” can be omitted since it is used as the subject in this adjective clause. However, when it is omitted, the verb after it should be changed to a present participle, that is, “specializing.” So, the sentence becomes:</p><p dir="ltr"><strong style="font-weight: 600;">Kaplan, Inc. specializing in offering customized intensive courses is widely recognized for helping students achieve the best exam results possible.</strong><br></p><p dir="ltr">Thus, the correct answer is (C) specializing. </p></span>