Read the excerpt from "Mending Wall."

Spring is the mischief in me, and I wonder
If I could put a notion in his head:
"Why do they make good neighbours? Isn't it
Where there are cows? But here there are no cows.
Before I built a wall I'd ask to know
What I was walling in or walling out,
And to whom I was like to give offence.
Something there is that doesn't love a wall,
That wants it down."

Now read "The Pasture," also by Robert Frost.

I'm going out to clean the pasture spring;
I'll only stop to rake the leaves away
(And wait to watch the water clear, I may):
I shan't be gone long.—You come too.

I'm going out to fetch the little calf
That's standing by the mother. It's so young,
It totters when she licks it with her tongue.
I shan't be gone long.—You come too. Which best accounts for the different views of spring expressed in the poems? a. Frost’s opinions changed through time. b. The poems have different speakers. c. Frost’s speakers represent his own views. d. The poems were written at different locations.