The correct answer is
C. Artists competed for the opportunity to build The Gates of Paradise. The one who won and was chosen to do this was Lorenzo Ghiberti. The Gates of Paradise refers to the golden doors on the Baptistery of San Giovanni in Florence, where each panel on the door depicts a scene from the Old Testament.
I think the answer is D because generally people don't make large scale monuments of random person they are normally famous or very important in some way
Hope this helps
Answer:
Le chant grégorien est le chant liturgique officiel de l'Église catholique dans le rite romain.