According to lines 64–71, the central issue in the debate over Pluto is:
\begin{equation}\begin{array}{l}{\text { A. whether Pluto is more similar to rocky planets }} \\ {\text { or the gas giants. }} \\ {\text { B. the distance of Pluto from the sun. }} \\ {\text { C. whether or not the issues raised by Pluto's }} \\ {\text { differences from the other TNOs are }} \\ {\text { substantial enough to create a new }} \\ {\text { classification for it. }}\end{array}\end{equation}
\begin{equation}\begin{array}{l}{\text { D. scientists conception of Pluto versus the view }} \\ {\text { of the general public. }}\end{array}\end{equation}