Answer:
C. Mimsy, slithy, and mome are likely adjectives.
Step-by-step explanation:
A piece of literature might feel entitled to include proper nouns non-existent in any dictionary for creative purposes. However, when it comes to adjectives and verbs, recognition of such terms is required so that readers can understand what's happening in the story.
It is known that Mimsy, Silthy, and Mome are adjectives because each one serves as modifier for a word. These are the gibberish word of the poem.