Select the correct answer.
John baked 12 cakes, 50 muffins, and 42 pastries on Friday. His goal for Saturday is to bake 3 times as many of each item. If [tex]\left[\begin{array}{l}12 \\ 50 \\ 42\end{array}\right][/tex] represents his production for Friday, which matrix represents his production for Saturday?
A. [tex]\left[\begin{array}{lll}36 & 150 & 126\end{array}\right][/tex]
B. [tex]\left[\begin{array}{lll}15 & 53 & 45\end{array}\right][/tex]
C. [tex]\left[\begin{array}{l}15 \\ 53 \\ 45\end{array}\right][/tex]
D. [tex]\left[\begin{array}{c}36 \\ 150 \\ 126\end{array}\right][/tex]