Đáp án đúng: D
Giải chi tiết:\(\begin{array}{l}\,M\left( x \right) = 0 \Leftrightarrow \left( {x - 2016} \right)\left( {x - 2017} \right) = 0\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \Leftrightarrow \left[ \begin{array}{l}x - 2016 = 0\\x - 2017 = 0\end{array} \right. \Leftrightarrow \left[ \begin{array}{l}x = 2016\\x = 2017\end{array} \right.\end{array}\)
Chọn D