<p>Effective March 1, all departments <u>will be required</u> to implement the following measures to reduce paper consumption.</p>
<p>The correct answer is <strong>(C) will be required</strong>.</p>
<p>In this sentence, we are talking about a future action that will happen after March 1. To express this, we need to use the future tense. The verb "require" should be in the future tense, which is "will be required."</p>
<p>Option (A) "require" is in the present tense, which does not match the future time frame of the sentence.</p>
<p>Option (B) "were required" is in the past tense, which also does not match the future time frame of the sentence.</p>
<p>Option (D) "has been required" is in the present perfect tense, which is not suitable for expressing a future action.</p>