混凝土标准养护条件是指温度为（    ）和相对湿度为（    ）以上的潮湿环境或水中。

A、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">20</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">±</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">5</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">℃、</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">85% </span>

B、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">20</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">±</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">3</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">℃、</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">90%</span>

C、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">20</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">±</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">3</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">℃、</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">95% </span>

D、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">&nbsp;20</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">±</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">2</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">℃、</span><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 14px">95%</span>