The best answer to the question regarding the effect of the repetition of phrases in the two stanzas is:
B. It suggests that despite changes, some things remain the same.
This choice accurately reflects how the repeated phrases in both stanzas convey a sense of continuity between the speaker's external environment and their internal emotional state, highlighting the persistent feelings of coldness, darkness, and dreariness despite the different subjects (the day vs. the speaker's life).