Which of the following is an example of personification from thoreau's walden?
a. "…whenever i looked out on the pond it impressed me like a tarn high up on the side of a mountain…"
b. "…as the sun arose, i saw it throwing off its nightly clothing of mist…"
c. "…both air and water being perfectly still, but the sky overcast, mid-afternoon had all the serenity of evening…"
d. "…for an hour, at least, some part of us awakes which slumbers all the rest of the day and night."