why is a system in your body called immune system if your not really IMMUNE to all the disese that atacks your immune system. lol i just though of this

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.