<p><span style="font-size:20px;"><span style="color:#27ae60;">The Right Answer</span></span></p>
<p>We can solve this with <span style="color:#8e44ad;"><strong>Math Strategy</strong></span>, using the comma directly following the blank. On the right-hand side, we can see that opposition to the ban has weakened, and the left-hand side should also convey this. The blank describes how the ban has changed, so if the opposition has weakened, we can fill the blank with something like "likely".</p>
<p>The best match for this blank is <span style="color:#27ae60;">imminent</span>, which suggests that the ban is "likely to happen soon".</p>
<p><span style="font-size:20px;"><span style="color:#e74c3c;">The Wrong Answers</span></span></p>
<ul>
<li><span style="color:#e74c3c;">imprudent</span> - This choice has <strong>no evidence</strong>. There's nothing indicating that the ban would not be a smart choice.</li>
<li><span style="color:#e74c3c;">fortuitous</span> - This choice has <strong>no evidence</strong>. There's nothing indicating that the ban would be coming at a fortunate time.</li>
<li><span style="color:#e74c3c;">premature</span> - This choice <strong>contradicts</strong> the logic. If the ban happened after the ozone hole was discovered, then it definitely didn't happen too early.</li>
<li><span style="color:#e74c3c;">unlikely</span> - This choice <strong>contradicts</strong> the logic. If the opposition had weakened, the ban would be more likely.</li>
</ul>