Which of the Following Best Matches the Description

Which of the following best matches the description?
-Author of Walden,which describes a year in which he lived in direct contact with nature.

A) Henry David Thoreau
B) preservation ethic
C) Rachel Carson
D) development ethic
E) conservation ethic
F) Ralph Waldo Emerson
G) Aldo Leopold
H) industrial ecology
I) none of above
J) John Muir
K) ethics
L) morals
M) environmental justice
N) deep ecology