What figure of speech does the following line from robert frost’s “nothing gold can stay” contain?

her hardest hue to hold.
a. simile
b. metaphor
c. allusion
d. alliteration
e. rhyme

D - alliteration

Explanation:Alliteration is the use of words with the same initial letters or sounds. Such words are usually placed in close proximity for greater effect. Notice how the initial sounds s and w are repeated in this line from Robert Frost's "Fire and Ice":

Some say the world will end in fire,

what are the options because I don't see them