Answer:
D
Explanation:
Scholars had to decide which hadith were to be trusted as authentic and which had been invented for political or theological purposes. To do this, they used a number of techniques which Muslims now call the science of hadith.[81]Hadith have been called "the backbone" of Islamic civilization,[5] and within that religion the authority of hadith as a source for religious law and moral guidance ranks second only to that of the Quran
