Lee has aligned the text and numbers in his table. He realizes that even though the columns are visually separated, he can make the columns even more distinct.

\begin{tabular}{|c|c|c|}
\hline
Planet & \begin{tabular}{c}
Mass \\
[tex]$\left(10^{24} kg\right.$[/tex] )
\end{tabular} & \begin{tabular}{c}
Diameter \\
(km)
\end{tabular} \\
\hline
Mercury & 0.330 & 4,879 \\
\hline
Venus & 4.87 & 12,104 \\
\hline
Earth & 5.97 & 12,756 \\
\hline
Mars & 0.642 & 6,792 \\
\hline
\end{tabular}

What would be the most helpful formatting option to accomplish this task?

A. Add color to the table.
B. Draw lines on the table.
C. Add borders to the table.
D. Insert lines into the table.

To enhance the visual distinction between the columns in Lee's table, the most helpful formatting option would be to add borders to the table. This technique will significantly aid in separating and clearly defining each column and row, making the overall table more readable and organized.

So, the solution to this task is:

Add borders to the table.

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