The book Kitab al Umm is written by__________?

A. Imam Abu Hanifa
B. Imam Shafi
C. Imam Malik
D. Imam Hambul

The Kitāb al-Umm (Arabic: كـتـاب الأم) is the first exhaustive compendium of Islamic code of law that is used as an authoritative guide by the Shafi’i school of fiqh (Islamic jurisprudence) within the Sunni branch of Islam. The work was composed by the founder of the Shafi’i school, Imām ash-Shāfi’ī (767-820 CE).