土方工程施工包括主要内容和辅助内容，其中辅助内容包括 (  ) 。

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

B、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">.</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">土壁支护</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">&nbsp; </span>

C、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">场地平整</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">&nbsp; </span>

D、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">降低水位</span>

E、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">路基填筑</span>