The reign of Caliph Uthman b. Affan is known for
- tax collection
- Hadith Collection
- justice and administrative fairness
-
standardization of the Qur'an
The correct answer is: D
Explanation
The reign of Caliph Uthman b. Affan is known for the standardization of the Qur'an. He commissioned a committee to produce a standard copy of the text, which is known as the Uthmanic codex.