我国刑法规定的完全负刑事责任的年龄是行为人已满 (  )

A、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 16px">12</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 16px">周岁</span>

B、<span style="TEXT-DECORATION: none"><span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 16px; TEXT-DECORATION: none">16</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 16px; TEXT-DECORATION: none">周岁</span></span>

C、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 16px">18</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 16px">周岁</span>

D、<span style="FONT-FAMILY: &#39;Times New Roman&#39;,&#39;serif&#39;; FONT-SIZE: 16px">14</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 16px">周岁</span>