R. at. e me on a scale of 1/10 XD

Amuseum displays an ancient aztec calendar. this object holds cultural value because

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

Which of these forms or genres appeared in the baroque period, but  not  previous periods?