The correct answer is C. Recommendation.
The word "recommendation" is a noun that means "an act of recommending someone or something." It is derived from the verb "recommend," which means "to advise someone to do something." The word "recommendation" is spelled with two "m"s and one "n."
The other options are incorrect because they are misspelled. Option A, "recommandation," is missing one "m." Option B, "recomandation," is missing one "n." Option D, "recomendation," is missing one "m" and one "n."
It is important to spell words correctly in order to be understood clearly. When you spell a word incorrectly, it can make you look unprofessional and can make it difficult for others to understand what you are trying to say.