The correct answer is C. Participle
Explanation:
In English grammar, a participle is a word that is formed adding either "-ing" or "-ed" to verbs, although in the case of irregular this rule changes. Additionally, in grammar, a participle can act as part of verbs, adjectives of nouns. For example, the participle of "dance" is "dancing" and this can be part of a verb as in "I have been dancing for years" or can act as a noun as in "Dancing is good". Therefore, inflecting or changing the verb "run" into "running" makes this word a participle as this word becomes an adjective, noun and can also be part of a verb with multiple words.
