From the options provided, the complete gerund phrase in the sentence is:
B. <span>hanging curtains or shades on a window</span>
Gerund is a word which is in its -ing form. It is derived from a verb but acts as a noun.
I had the same problem with this question and I know I'm late, but I am answering it for future students who may have trouble with this question. I believe the narrator is saying that if Helen Grey does not change her ways she will be unhappy. Men think she is beautiful, but because her personality is ugly they will find her unattractive. She will be bitter. In the poem it states, "Take heed, you yet may trip and fall, and no man care to stretch his arms."
<span>the words that the appositive renames or further identifies - checks and bonds</span>
