<p>The correct answer is <strong>(B) will be discontinued</strong>.</p>
<p>In this sentence, we are talking about a future action that the company will take. To express future actions, we use the modal verb "will" followed by the base form of the main verb.</p>
<p>Option (A) "will discontinue" is grammatically incorrect because it does not include the linking verb "be" before the main verb "discontinue".</p>
<p>Option (C) "have discontinued" is grammatically incorrect because it uses the present perfect tense, which indicates actions that have already been completed in the past, not actions that will happen in the future.</p>
<p>Option (D) "is discontinuing" is grammatically incorrect because it uses the present continuous tense, which indicates actions that are happening at the moment, not actions that will happen in the future.</p>
<p>Therefore, the correct form to express the future action of discontinuing the current model is "will be discontinued".</p>