Please need help only have a bit more time!

Organum was first developed by religious singers adding another melody directly above the chant and mirroring the chant line. true false

Ineed someone to describe what they mean in the instructions !

Which statement is true? select one: a. all art created in florence during the renaissance was commissioned by the medici family. b. without wealthy patrons, it is likely that many italian renaissance works would not have been created. c. religion was the driving force behind works created by leonardo and michelangelo. d. the public was responsible for determining whether an artwork was great.