Why Is the Muslim Holy Book Called the Qur'an,or Recitation

Why is the Muslim holy book called the Qur'an,or Recitation?

A) Because Muhammad was ordered to speak the revelations he received from Gabriel.
B) Because Muslims are expected to recite it from memory and it has never been written down.
C) Because most of it repeats sections of the Old and New Testaments word for word.
D) Because Allah recited it to Moses who then repeated it to Muhammad.
E) Because only ordained priests are allowed to read or recite the Qur'an.