The answer is C cause if you rotate it the shape looks different but if it had rotational symmetry it could be rotated less than 360 degrees and still look the same
<h2><u><em>at x = 3 D = .1086</em></u></h2><h2><u><em /></u></h2><h2><u><em>at x = 4 D = .0869</em></u></h2><h2><u><em /></u></h2><h2><u><em>at x = 5 D = .0724</em></u></h2>