<em><u>Answer:</u></em>
<em>D. oct-</em>
<em><u>Explanation:</u></em>
<em>The prefix used to name a hydrocarbon that has one, two, three, four, five, six, seven, eight, nine and ten carbon parent chain should be, meth-, eth-, prop-, but-, pent-, hex-, sept-, oct-, non- and dec- respectively.</em>