Concept:A hadith collection called "Musnad" is organized based on the chain of narrators (isnad) and the text (matn) of each hadith.Explanation:In hadith literature, collections are arranged in different ways.A "Musnad" groups hadiths according to the narrators mentioned in the isnad.It also presents the matn, or the actual words of the Prophet (PBUH), with each chain.This method focuses on the narrators rather than on subject matter.Therefore, the type of compilation that is arranged according to isnad and matn is called Musnad.Answer:C. Musnad