在 S7-200 PLC 指令系统中，循环结束指令是（    ）

A、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; COLOR: black; FONT-SIZE: 14px">LCR</span>

B、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; COLOR: black; FONT-SIZE: 14px">NEXT</span>

C、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; COLOR: black; FONT-SIZE: 14px">LRD</span>

D、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; COLOR: black; FONT-SIZE: 14px">LPP</span>