Concept:Umar b. Abdul Aziz was a key figure in the early preservation of Hadith literature.
Explanation:He is remembered because he gave official orders for the collection and compilation of Hadith.
He instructed scholars in different regions to write down the authentic sayings and actions of the Prophet Muhammad (SAW).
This step helped protect Hadith from being lost or mixed with false reports.
It marked the beginning of the formal written collection of Hadith in Islamic history.
He did not study under Aishah, nor did he institute Tafsir of Hadith.
The Sahihayn, meaning Sahih al-Bukhari and Sahih Muslim, were compiled after his time.
Therefore, the correct reason is that he ordered the collection of Hadith.
Answer:A. gave orders for the collection of Hadith