Deandra is trying to explain the major effect of the volta in line 9 of this sonnet:

when in disgrace with fortune and men's eyes,

i all alone beweep my outcast state,

and trouble deaf heaven with my bootless cries,

and look upon myself and curse my fate,

wishing me like to one more rich in hope, line 5

featured like him, like him with friends possessed,

desiring this man's art and that man's scope,

with what i most enjoy contented least;

yet in these thoughts myself almost despising,

haply i think on thee, and then my state, line 10

(like to the lark at break of day arising

from sullen earth) sings hymns at heaven's gate;

for thy sweet love remembered such wealth brings

that then i scorn to change my state with kings.

–william shakespeare, “sonnet 29”

which of the following explanations should she use?

a.
the volta signals a change in the rhyme scheme and meter.
b.
the volta summarizes the ideas introduced in the octave of the sonnet.
c.
the volta introduces a new idea that indicates a shift in tone from the octave of the sonnet.
d.
the volta introduces a new speaker who answers the speaker from the octave of the sonnet.