Explanation

A is correct because a Hadith fundamentally consists of the chain of narrators (Sanad) and the actual text or content (Matan). B is incorrect because Musnad refers to a collection of hadiths organized by narrator. C is incorrect because Sahifah is not the standard term for the other part of a Hadith. D is incorrect because Riwayat is a general term meaning narration, not the specific component name.