<p dir="ltr">Let's analyze the sentence:<br></p><p><strong>A snowstorm (____ by freezing rain) has been forecast in the Midwest on Sunday evening.</strong><span> </span></p><p>The part wrapped with "()" is an adjective clause.</p><p dir="ltr">What is missing here is the relative pronoun "which" and the verb "was accompanied". So, the sentence becomes:</p><p dir="ltr"><strong>A snowstorm (which was accompanied by freezing rain) has been forecast in the Midwest on Sunday evening.</strong><span> </span><br></p><p dir="ltr"><span><span>The adjective clause “which was accompanied by freezing rain” modifies the antecedent “A snowstorm.” </span></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, “being.” So, the sentence becomes:</p><p dir="ltr"><strong>A snowstorm (being accompanied by freezing rain) has been forecast in the Midwest on Sunday evening.</strong><span> </span><br></p><p dir="ltr"><span><span>“being” can be omitted here as well. So the sentence becomes :</span><span> </span></span></p><p><span>A snowstorm (accompanied by freezing rain) has been forecast in the Midwest on Sunday evening.</span><span> </span><br></p><p dir="ltr"><span><span>The correct answer is (A) accompanied. </span></span></p>