help me out here luvs x (Which of the following creates an unexpected rhythm in the poem?)

The courage that my mother had

Went with her, and is with her still:

Rock from New England quarried;

Now granite in a granite hill.

The golden brooch my mother wore

She left behind for me to wear;

I have no thing I treasure more:

Yet, it is something I could spare.

Oh, if instead she’d left to me

The thing she took into the grave!–

That courage like a rock, which she

Has no more need of, and I have.

Which of the following creates an unexpected rhythm in the poem?

A) the use of alliteration in line 2
B) the rhymes at the ends of lines 5 and 7
C) the rhyme at the ends of line 1 and 3
D) the assonance in line 7