The answer is most likely to be A).
Hope this helps:)
Il Duomo di Firenze<span>, as it is ordinarily called, was begun in 1296 in the </span>Gothic<span> style with the design of </span>Arnolfo di Cambio<span> and completed structurally in 1436 with the dome engineered by </span>Filippo Brunelleschi<span>.</span>
