Hàm số \(y = \left| {x + 1} \right| + \left| {x - 3} \right|\) được viết lại là

A. \(y = \left\{ \begin{array}{l}
 - 2x + 2\,\,\,\,khi\,\,\,\,x \le  - 1\\
4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\,\, - 1 < x \le 3\\
2x - 1\,\,\,\,\,\,\,khi\,\,\,\,x > 3
\end{array} \right.\)

B. \(y = \left\{ \begin{array}{l}
2x - 2\,\,\,\,\,\,\,khi\,\,\,\,x \le  - 1\\
4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\, - 1 < x \le 3\\
 - 2x + 2\,\,\,khi\,\,\,x > 3
\end{array} \right.\)

C. \(y = \left\{ \begin{array}{l}
2x + 2\,\,\,\,\,\,\,\,khi\,\,\,\,x \le  - 1\\
4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\, - 1 < x \le 3\\
 - 2x - 2\,\,\,\,khi\,\,\,\,\,x > 3
\end{array} \right.\)

D. \(y = \left\{ \begin{array}{l}
 - 2x + 2\,\,\,\,khi\,\,\,x \le  - 1\\
4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\,\, - 1 < x \le 3\\
2x - 2\,\,\,\,\,\,khi\,\,\,\,x > 3
\end{array} \right.\)