<p>The recent <strong>fluctuation</strong> in the oil price made it increasingly difficult to predict the income of transport companies.</p><p><span style="font-size: 13.008px;">The correct answer is </span><span style="font-size: 13.008px;">(B) fluctuation.</span><br></p><p><span style="font-size: 13.008px;">The word "fluctuation" refers to changes or variations, especially in price. It accurately describes the recent changes in the oil price mentioned in the sentence.</span><span style="font-size: 13.008px;"><br></span></p>
<div data-answer="b">(A) increment - Incorrect. The word "increment" refers to an increase or addition. However, in this context, we are talking about changes in the oil price, which can go both up and down.</div>
<div data-answer="b">(C) charges - Incorrect. The word "charges" refers to fees or costs, which are not directly related to the changes in the oil price.</div>
<div data-answer="b">(D) development - Incorrect. The word "development" refers to the process of growth or advancement. It does not accurately describe the changes in the oil price mentioned in the sentence.</div>