What does Thoreau mean when he says, "Before I had done I was more the friend than the foe of the pine tree, though I had cut down some of them, having become better acquainted with it"?
a) Thoreau regrets his actions of cutting down pine trees.
b) Thoreau sees himself as both a friend and adversary to nature.
c) Thoreau acknowledges his conflicting feelings towards pine trees.
d) Thoreau reflects on his evolving relationship with nature.