<p>The correct answer is (B) in light of.</p>
<p>The phrase "in light of" is used to indicate that something is being considered or judged based on a particular factor or circumstance. In this case, the administrative supervisor is considering the termination of Mark's contract based on his inability to get along with other workers.</p>
<p>Option (A) "in charge of" is incorrect because it implies that the administrative supervisor is responsible for Mark's contract termination, which is not the intended meaning.</p>
<p>Option (C) "on behalf" is incorrect because it means acting or speaking for someone else, which is not applicable in this context.</p>
<p>Option (D) "by means of" is incorrect because it means using a particular method or tool, which is not relevant to the termination of Mark's contract.</p>