Tell me if you know what yntbkshyfyn or iby means

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

For the difference command to work, what needs to happen?

When clarisse compares percy to the big three how does he feel