The Railway Train
By Emily Dickinson
I like to see it lap the miles, 
And lick the valleys up, 
And stop to feed itself at tanks; 
And then, prodigious, step 
Around a pile of mountains, 
And, supercilious, peer
In shanties by the sides of roads; 
And then a quarry pare
To fit its sides, and crawl between, 
Complaining all the while
In horrid, hooting stanza; 
Then chase itself down hill
And neigh like Boanerges, 
Then, punctual as a star, 
Stop- docile and omnipotent
At its own stable door. 
Which line of the poem makes it clear that the train is being compared to a horse?
A. "In shanties by the sides of roads"
B. "And then the quarry pare"
C. "Complaining all the while"
D. "And neigh like Boanerges"