The dome, designed by <em><u>Filippo Brunelleschi</u></em>, of the Cathedral of Santa Maria del Fiore, Florence. Mid-20th-century criticism modified the earlier approach to Brunelleschi's buildings as the foundations of Renaissance architecture.
A cross-connection is a point in plumbing where it is possible for a non potable (not drinkable/safe to drink) to come in contact with a potable (safe to drink) water supply. so I think the answer would be A
