That Time of Year Thou Mayst in Me Behold

That time of year thou mayst in me behold
When yellow leaves, or none, or few, do hang
Upon those boughs which shake against the cold,
Bare ruin'd choirs, where late the sweet birds sang.
In me thou see'st the twilight of such day
As after sunset fadeth in the west;
Which by and by black night doth take away,
Death's second self, that seals up all in rest.
In me thou see'st the glowing of such fire,
That on the ashes of his youth doth lie,
As the death-bed, whereon it must expire,
Consum'd with that which it was nourish'd by.
This thou perceiv'st, which makes thy love more strong,
To love that well, which thou must leave ere long.
-What is the main idea of this sonnet?

A) Love is like a burning fire that cannot be extinguished.
B) The speaker believes his lover cares for him more because the speaker will soon die.
C) The speaker believes he and his lover are nearing the end of their relationship and it will soon die out.
D) The speaker believes his lover perceives that the relationship is ending when, in fact, it is not.