Why the Qur'an has supreme authority for Muslims

Why does the Qur'an have supreme authority for Muslims :

1) Muslims believe it contains the exact words of Allah.This is very important because Muslims believe that other holy books in the Qu'ran like the Injil have lost their original message due to constant changing, and translation, which means the original message is lost

2) It was brought to people through the final prophet. Although Allah has sent his message with different prophets at different times, this message was for all the people of all time and would not be repeated but the message is always found in…