Which best states the structure of the section entitled “solitude” in walden?

a)thoreau describes a sequence of events he enjoys at night, and then compares himself to others who do not understand his pleasure in being alone in nature.

b)thoreau compares the nighttime and daytime landscapes, and then concludes that they are alike, much as all people are alike.

c)thoreau describes the effect that being alone in the evening has on him, and then describes the effect the same circumstance has on a friend of his.

d)thoreau explains that whatever concerns he has had during the day are resolved by a walk in the evening, and then advises other people to follow his example.