Answer: D
Explanation: the last one sounds the most confident
A. Helen must clean the floors and the walls.
The second one does because snow is singular
The literary device used in these lines is Personification.
The personification is a figure of speech in which a thing is given human attributes. The non-human objects are portrayed in such a way that we feel they have the capacity to act like human beings. This device makes the piece more interesting to read and makes it more sensitive to the reader.
the answer is d. Last but not the least, be true to yourself.