I think the first or the second phrase works the best
Answer:
A. it appears he didn't know the full story
Explanation:
its right
Thoreau borrowed an axe and spent some days gathering things needed in framing his house. He cut and hew timber, studs, and rafters without thinking about many things but the essence of nature. He made more familiarity of the trees and enjoyed the company of nature while preparing the woods needed to build his house.
The first answer is interogative because its sort of like an interrogation.
And i think the next would be conditional
