Explanation:
Do you need to know what to say or how to say it
As one comes closer to the understanding of poetry, then one becomes more able too apply their understanding to their own spiritual being. Robert Frost was able to create his own beliefs based on his experience with studying and writing poetry.
The Answer is D. Most sadly
The comparative of the adverb sadly is more sadly so the superlative is most sadly.
Hope this helps :-) <3