<p>The petroleum reserves one was an apples-to-oranges comparison; it was comparing the PROCESS of drilling petroleum in one place to PETROLEUM RESERVES in another, which is incorrect. You needed to fix it so they were both comparing the process of attaining the petroleum. </p>
<p>@ncccc1701 not really…but I remember the first/original answer choice was “That petroleum reserves…” and answer choice E was “Petroleum reserves…”, im confused as to which one is the answer between these two</p>
<p>@fireonice why did the “that of” have to be there? Didn’t that hinder the actual meaning of the sentence? I put the answer with just “Petroleum Reserves…”</p>