Giúp em với ạ em cảm ơn

$\begin{array}{l} A = \left\{ {x + 1|x \in \mathbb{N},x \le 5} \right\}\\ x \le 5,x \in \mathbb{N} \Rightarrow x \in \left\{ {0;1;2;3;4;5} \right\}\\  \Rightarrow A = \left\{ {1;2;3;4;5;6} \right\}\\  \to D \end{array}$