Concept:The correct possessive form after “I am” is the absolute possessive pronoun.Explanation:“Your” is a possessive adjective and must be followed by a noun, e.g., “your letter.”“Yours” is a possessive pronoun and stands alone, e.g., “I am yours faithfully.”“Your’s” and “yours’” are incorrect because possessive pronouns do not take an apostrophe.Answer:C. yours