How can studying the opinion an art critic be educational?

For 15 points. somebody once told me the world was gonna roll me. the next line is?

What happens when there is a transfer of artwork using a grid? a. acts to verify the analysis of the composition b. the viewer's eye adjust to unity c. unify the composition d. none of the above

How did brunelleschi solve his problem with the dome of the florence cathedral? a. he created an outer support shell. b. he created many layers of support within the dome. c. he created external supports for the dome. d. all of the above