In order to be able to make an effective comparison, it is important to determine whether your topics

do not have dissimilarities

appeal to your audience

are widely known

share enough qualities

Share enough qualities for gradpoint users.

D) share enough qualities.

Explanation: a comparison is a consideration or estimate of the similarities or dissimilarities between two things or people. From the given options, the one that expresses the element that will allow us to make an effective comparison, is the corresponding to option D: it is important to determine whether the topics share enough qualities, because it is based on those qualities (that can be similarities or differences) that we are going to make the comparison.

maybe i could if you provided more information, such as a image of the text? (;