Concept:A noun names a person, place, thing, or idea. Here we need the noun form of the verb "succeed".Explanation:The verb "succeed" means to achieve a goal. Its noun form is "success", which refers to the fact of achieving that goal.Option A (Successful) is an adjective. Option B (Succeeding) is a verb form (gerund). Option D (Successfully) is an adverb.Only "Success" is a noun that matches the meaning.Answer:Option C: Success