现场施工中，柱子竖向钢筋的连接应优先采用 （    ）

A、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">闪光对焊</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">&nbsp;&nbsp;</span>

B、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">绑扎连接</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">&nbsp;&nbsp;</span>

C、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">电渣压力焊</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">&nbsp;&nbsp;</span>

D、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">&nbsp;</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">电弧焊</span>