The lines that best support the answer to Part A would likely be:
"Through my fingers to the deep, / While I weep — while I weep!" (Lines 17-18)
These lines convey a sense of loss and sorrow, indicating the speaker's emotional response to the fleeting nature of life or time, which aligns with themes of inevitability and helplessness often explored in poetry.
However, the ideal choice could depend on the specific context of the question in Part A. If you can provide that context, I can give a more tailored response.