If X, Y and Z are different digits, then the largest possible 3-digit sum for
\begin{array}{r}
\phantom{+} X \, X \, X \\
\phantom{+} Y \, X \\
+\quad X \\
\hline
\end{array}
has the form
Answer Choices
A. X X Y
B. X Y Z
C. Y Y X
D. Y Y Z
E. Z Z Y