The adjective in the given sentence is ‘Italian’. It is an adjective of origin that tells you which place a person or thing comes from or which place they belong to. Thus option C is correct. On the other hand, an interrogative adjective is similar to an interrogative pronoun. However, they cannot stand on their own. In other words, they serve to modify another term, especially a noun.The words “which” and “what” are the two interrogative adjectives and are used in interrogative sentences to modify nouns found in the question. Since the sentence doesn’t contain any interrogative adjectives options A is incorrect. An adjective of quantity describes the quantity or amount of something, especially the noun. For example, ‘some food’ or ‘enough water’. While an adjective of substance explains what the noun is made of, like ‘a plastic box’ or ‘silk dress’. Since the given adjective denotes origin and not quantity or substance options B and D are incorrect.