Thoreau was often alone in the woods or by the pond, lost in spiritual communication with _______.

A、<span style="font-size: 16px;font-family: &#39;Times New Roman&#39;, serif">nature&nbsp;</span>

B、<span style="font-size: 16px;font-family: &#39;Times New Roman&#39;, serif">&nbsp;transcendentalist ideas</span>

C、<span style="font-size: 16px;font-family: &#39;Times New Roman&#39;, serif">human beings&nbsp;</span>

D、<span style="font-size: 16px;font-family: &#39;Times New Roman&#39;, serif">celestrial beings</span>