Go to the room, take a card at random, and ask which number is most likely to be the unit digit of the number drawn by Jack and Jill.

Translate the above text into English, please keep the original text's line breaks and format, and output the translation result directly.
12
I
A
12. The list below, the numbers in the table represent the units digit of the sum of two numbers.
\begin{tabular}{ccccccccc}
1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\
\hline 2 & 3 & 4 & 3 & 6 & 7 & 8 & 0 & 3 \\
3 & 4 & 0 & 3 & 7 & 3 & 9 & 1 & 1 \\
4 & 5 & 6 & 7 & 3 & 9 & 0 & 1 & 2 \\
5 & 6 & 1 & 3 & 3 & 0 & 1 & 2 & 3 \\
6 & 7 & 8 & 9 & 0 & 1 & 2 & 3 & 4 \\
7 & 6 & 9 & 0 & 1 & 2 & 3 & 4 & 5 \\
8 & 9 & 0 & 1 & 2 & 3 & 4 & 5 & 6 \\
9 & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 \\
0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\
\hline
\end{tabular}

The digit 0 appears 9 times, while the digits 1-9 each appear 8 times, so for now